Upgrade grpc remove protobuf since no dependency.

Signed-off-by: Bogdan Drutu <bogdandrutu@gmail.com>

WORKSPACE

@@ -29,16 +29,6 @@ load("@com_github_grpc_grpc//bazel:grpc_extra_deps.bzl", "grpc_extra_deps")
 
 grpc_extra_deps()
 
-load("@upb//bazel:repository_defs.bzl", "bazel_version_repository")
-
-bazel_version_repository(name = "upb_bazel_version")
-
-# Load protobuf deps
-
-load("@com_google_protobuf//:protobuf_deps.bzl", "protobuf_deps")
-
-protobuf_deps()
-
 # Load prometheus C++ dependencies.
 
 load("@com_github_jupp0r_prometheus_cpp//bazel:repositories.bzl", "prometheus_cpp_repositories")

bazel/repository.bzl

@@ -24,22 +24,10 @@ def opentelemetry_cpp_deps():
     maybe(
         http_archive,
         name = "com_github_grpc_grpc",
-        sha256 = "d6277f77e0bb922d3f6f56c0f93292bb4cfabfc3c92b31ee5ccea0e100303612",
-        strip_prefix = "grpc-1.28.0",
+        sha256 = "7372a881122cd85a7224435a1d58bc5e11c88d4fb98a64b83f36f3d1c2f16d39",
+        strip_prefix = "grpc-1.34.0",
         urls = [
-            "https://github.com/grpc/grpc/archive/v1.28.0.tar.gz",
-        ],
-    )
-
-    # Uses older protobuf version because of
-    # https://github.com/protocolbuffers/protobuf/issues/7179
-    maybe(
-        http_archive,
-        name = "com_google_protobuf",
-        sha256 = "b679cef31102ed8beddc39ecfd6368ee311cbee6f50742f13f21be7278781821",
-        strip_prefix = "protobuf-3.11.2",
-        urls = [
-            "https://github.com/protocolbuffers/protobuf/releases/download/v3.11.2/protobuf-all-3.11.2.tar.gz",
+            "https://github.com/grpc/grpc/archive/v1.34.0.tar.gz",
         ],
     )