paquo.jpype_backend: remove macos jvm_options

This solves the mystery why macos used a different image backend
which caused the downsampling test to report a different set of
levels...

#23 (comment)

paquo/jpype_backend.py

@@ -129,10 +129,7 @@ def qupath_jvm_info_from_qupath_dir(qupath_dir: Path) -> QuPathJVMInfo:
         app_dir = qupath_dir / "Contents" / "app"
         runtime_dir = qupath_dir / "Contents" / "runtime" / "Contents" / "Home"
         jvm_dir = runtime_dir / "lib" / "libjli.dylib"  # not server/libjvm.dylib
-        jvm_options = [
-            f'-Djava.library.path={app_dir}:{qupath_dir}/Contents/MacOS',
-            f'-Djava.launcher.path={qupath_dir}/Contents/MacOS',
-        ]
+        jvm_options = []
 
     elif system == "Windows":
         app_dir = qupath_dir / "app"

paquo/tests/test_images.py

@@ -46,25 +46,14 @@ def test_image_properties_from_image_server(image_entry):
 
 
 def test_image_downsample_levels(image_entry):
-    # TODO INVESTIGATE: VERY STRANGE???
-    import platform
-    if platform.system() == "Darwin":
-        # ON OSX WE GET ONE DOWNSAMPLE LEVEL
-        levels = {
-            0: {'downsample': 1.0,
-                'height': 2967,
-                'width': 2220},
-        }
-    else:
-        # ON THE OTHER OSES IT'S TWO???
-        levels = {
-            0: {'downsample': 1.0,
-                'height': 2967,
-                'width': 2220},
-            1: {'downsample': 3.865438534407666,
-                'height': 768,
-                'width': 574},
-        }
+    levels = {
+        0: {'downsample': 1.0,
+            'height': 2967,
+            'width': 2220},
+        1: {'downsample': 3.865438534407666,
+            'height': 768,
+            'width': 574},
+    }
     assert image_entry.downsample_levels == levels