diff --git a/poetry.lock b/poetry.lock
index cf437c6d0a9..df3d6547bdb 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -396,7 +396,7 @@ python-versions = "*"
 
 [[package]]
 name = "mypy"
-version = "0.982"
+version = "0.990"
 description = "Optional static typing for Python"
 category = "dev"
 optional = false
@@ -410,6 +410,7 @@ typing-extensions = ">=3.10"
 
 [package.extras]
 dmypy = ["psutil (>=4.0)"]
+install-types = ["pip"]
 python2 = ["typed-ast (>=1.4.0,<2)"]
 reports = ["lxml"]
 
@@ -951,7 +952,7 @@ testing = ["flake8 (<5)", "func-timeout", "jaraco.functools", "jaraco.itertools"
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.7"
-content-hash = "5f69872916713817bf4617699cc1ed4a0baf50ed78422cc821cc14e43ff2de4b"
+content-hash = "d81d2884ee157f8ecc240a6c1ae2c8c95dfb9a9a34272b7e5831d2a2a62a31b6"
 
 [metadata.files]
 attrs = [
@@ -1298,30 +1299,36 @@ msgpack = [
     {file = "msgpack-1.0.4.tar.gz", hash = "sha256:f5d869c18f030202eb412f08b28d2afeea553d6613aee89e200d7aca7ef01f5f"},
 ]
 mypy = [
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-    {file = "mypy-0.982-cp310-cp310-macosx_10_9_x86_64.whl", hash = "sha256:41fd1cf9bc0e1c19b9af13a6580ccb66c381a5ee2cf63ee5ebab747a4badeba3"},
-    {file = "mypy-0.982-cp310-cp310-macosx_11_0_arm64.whl", hash = "sha256:f793e3dd95e166b66d50e7b63e69e58e88643d80a3dcc3bcd81368e0478b089c"},
-    {file = "mypy-0.982-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:86ebe67adf4d021b28c3f547da6aa2cce660b57f0432617af2cca932d4d378a6"},
-    {file = "mypy-0.982-cp310-cp310-musllinux_1_1_x86_64.whl", hash = "sha256:175f292f649a3af7082fe36620369ffc4661a71005aa9f8297ea473df5772046"},
-    {file = "mypy-0.982-cp310-cp310-win_amd64.whl", hash = "sha256:8ee8c2472e96beb1045e9081de8e92f295b89ac10c4109afdf3a23ad6e644f3e"},
-    {file = "mypy-0.982-cp37-cp37m-macosx_10_9_x86_64.whl", hash = "sha256:58f27ebafe726a8e5ccb58d896451dd9a662a511a3188ff6a8a6a919142ecc20"},
-    {file = "mypy-0.982-cp37-cp37m-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:d6af646bd46f10d53834a8e8983e130e47d8ab2d4b7a97363e35b24e1d588947"},
-    {file = "mypy-0.982-cp37-cp37m-musllinux_1_1_x86_64.whl", hash = "sha256:e7aeaa763c7ab86d5b66ff27f68493d672e44c8099af636d433a7f3fa5596d40"},
-    {file = "mypy-0.982-cp37-cp37m-win_amd64.whl", hash = "sha256:724d36be56444f569c20a629d1d4ee0cb0ad666078d59bb84f8f887952511ca1"},
-    {file = "mypy-0.982-cp38-cp38-macosx_10_9_universal2.whl", hash = "sha256:14d53cdd4cf93765aa747a7399f0961a365bcddf7855d9cef6306fa41de01c24"},
-    {file = "mypy-0.982-cp38-cp38-macosx_10_9_x86_64.whl", hash = "sha256:26ae64555d480ad4b32a267d10cab7aec92ff44de35a7cd95b2b7cb8e64ebe3e"},
-    {file = "mypy-0.982-cp38-cp38-macosx_11_0_arm64.whl", hash = "sha256:6389af3e204975d6658de4fb8ac16f58c14e1bacc6142fee86d1b5b26aa52bda"},
-    {file = "mypy-0.982-cp38-cp38-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:7b35ce03a289480d6544aac85fa3674f493f323d80ea7226410ed065cd46f206"},
-    {file = "mypy-0.982-cp38-cp38-musllinux_1_1_x86_64.whl", hash = "sha256:c6e564f035d25c99fd2b863e13049744d96bd1947e3d3d2f16f5828864506763"},
-    {file = "mypy-0.982-cp38-cp38-win_amd64.whl", hash = "sha256:cebca7fd333f90b61b3ef7f217ff75ce2e287482206ef4a8b18f32b49927b1a2"},
-    {file = "mypy-0.982-cp39-cp39-macosx_10_9_universal2.whl", hash = "sha256:a705a93670c8b74769496280d2fe6cd59961506c64f329bb179970ff1d24f9f8"},
-    {file = "mypy-0.982-cp39-cp39-macosx_10_9_x86_64.whl", hash = "sha256:75838c649290d83a2b83a88288c1eb60fe7a05b36d46cbea9d22efc790002146"},
-    {file = "mypy-0.982-cp39-cp39-macosx_11_0_arm64.whl", hash = "sha256:91781eff1f3f2607519c8b0e8518aad8498af1419e8442d5d0afb108059881fc"},
-    {file = "mypy-0.982-cp39-cp39-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:eaa97b9ddd1dd9901a22a879491dbb951b5dec75c3b90032e2baa7336777363b"},
-    {file = "mypy-0.982-cp39-cp39-musllinux_1_1_x86_64.whl", hash = "sha256:a692a8e7d07abe5f4b2dd32d731812a0175626a90a223d4b58f10f458747dd8a"},
-    {file = "mypy-0.982-cp39-cp39-win_amd64.whl", hash = "sha256:eb7a068e503be3543c4bd329c994103874fa543c1727ba5288393c21d912d795"},
-    {file = "mypy-0.982-py3-none-any.whl", hash = "sha256:1021c241e8b6e1ca5a47e4d52601274ac078a89845cfde66c6d5f769819ffa1d"},
-    {file = "mypy-0.982.tar.gz", hash = "sha256:85f7a343542dc8b1ed0a888cdd34dca56462654ef23aa673907305b260b3d746"},
+    {file = "mypy-0.990-cp310-cp310-macosx_10_9_universal2.whl", hash = "sha256:aaf1be63e0207d7d17be942dcf9a6b641745581fe6c64df9a38deb562a7dbafa"},
+    {file = "mypy-0.990-cp310-cp310-macosx_10_9_x86_64.whl", hash = "sha256:d555aa7f44cecb7ea3c0ac69d58b1a5afb92caa017285a8e9c4efbf0518b61b4"},
+    {file = "mypy-0.990-cp310-cp310-macosx_11_0_arm64.whl", hash = "sha256:8f694d6d09a460b117dccb6857dda269188e3437c880d7b60fa0014fa872d1e9"},
+    {file = "mypy-0.990-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:269f0dfb6463b8780333310ff4b5134425157ef0d2b1d614015adaf6d6a7eabd"},
+    {file = "mypy-0.990-cp310-cp310-musllinux_1_1_x86_64.whl", hash = "sha256:8798c8ed83aa809f053abff08664bdca056038f5a02af3660de00b7290b64c47"},
+    {file = "mypy-0.990-cp310-cp310-win_amd64.whl", hash = "sha256:47a9955214615108c3480a500cfda8513a0b1cd3c09a1ed42764ca0dd7b931dd"},
+    {file = "mypy-0.990-cp311-cp311-macosx_10_9_universal2.whl", hash = "sha256:4a8a6c10f4c63fbf6ad6c03eba22c9331b3946a4cec97f008e9ffb4d3b31e8e2"},
+    {file = "mypy-0.990-cp311-cp311-macosx_10_9_x86_64.whl", hash = "sha256:cd2dd3730ba894ec2a2082cc703fbf3e95a08479f7be84912e3131fc68809d46"},
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+    {file = "mypy-0.990-cp311-cp311-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:262c543ef24deb10470a3c1c254bb986714e2b6b1a67d66daf836a548a9f316c"},
+    {file = "mypy-0.990-cp311-cp311-musllinux_1_1_x86_64.whl", hash = "sha256:3ff201a0c6d3ea029d73b1648943387d75aa052491365b101f6edd5570d018ea"},
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+    {file = "mypy-0.990-cp38-cp38-macosx_10_9_universal2.whl", hash = "sha256:be88d665e76b452c26fb2bdc3d54555c01226fba062b004ede780b190a50f9db"},
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+    {file = "mypy-0.990-cp38-cp38-musllinux_1_1_x86_64.whl", hash = "sha256:49082382f571c3186ce9ea0bd627cb1345d4da8d44a8377870f4442401f0a706"},
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+    {file = "mypy-0.990-cp39-cp39-macosx_11_0_arm64.whl", hash = "sha256:cc6019808580565040cd2a561b593d7c3c646badd7e580e07d875eb1bf35c695"},
+    {file = "mypy-0.990-cp39-cp39-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:2a3150d409609a775c8cb65dbe305c4edd7fe576c22ea79d77d1454acd9aeda8"},
+    {file = "mypy-0.990-cp39-cp39-musllinux_1_1_x86_64.whl", hash = "sha256:3227f14fe943524f5794679156488f18bf8d34bfecd4623cf76bc55958d229c5"},
+    {file = "mypy-0.990-cp39-cp39-win_amd64.whl", hash = "sha256:c76c769c46a1e6062a84837badcb2a7b0cdb153d68601a61f60739c37d41cc74"},
+    {file = "mypy-0.990-py3-none-any.whl", hash = "sha256:8f1940325a8ed460ba03d19ab83742260fa9534804c317224e5d4e5aa588e2d6"},
+    {file = "mypy-0.990.tar.gz", hash = "sha256:72382cb609142dba3f04140d016c94b4092bc7b4d98ca718740dc989e5271b8d"},
 ]
 mypy-extensions = [
     {file = "mypy_extensions-0.4.3-py2.py3-none-any.whl", hash = "sha256:090fedd75945a69ae91ce1303b5824f428daf5a028d2f6ab8a299250a846f15d"},
diff --git a/pyproject.toml b/pyproject.toml
index a07edeb1d37..ae9aba79c57 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -93,7 +93,7 @@ pytest-xdist = { version = "^2.5", extras = ["psutil"] }
 zipp = { version = "^3.4", python = "<3.8" }
 
 [tool.poetry.group.typing.dependencies]
-mypy = ">=0.971"
+mypy = ">=0.990"
 types-html5lib = ">=1.1.9"
 types-jsonschema = ">=4.9.0"
 types-requests = ">=2.28.8"
diff --git a/src/poetry/packages/locker.py b/src/poetry/packages/locker.py
index f9ff42b8ba7..7fd19669457 100644
--- a/src/poetry/packages/locker.py
+++ b/src/poetry/packages/locker.py
@@ -464,8 +464,3 @@ def _dump_package(self, package: Package) -> dict[str, Any]:
                 data["develop"] = package.develop
 
         return data
-
-
-class NullLocker(Locker):
-    def set_lock_data(self, root: Package, packages: list[Package]) -> bool:
-        pass