style: remove unneded dependency

importlib-metadata not needed anymore after dropping support for Python
3.7.

Signed-off-by: Silvano Cirujano Cuesta <silvano.cirujano-cuesta@siemens.com>

Author: Silvanoc

linkml_runtime/__init__.py

@@ -6,10 +6,7 @@
 # use importlib.metadata to read the version provided
 # by the package during installation. Do not hardcode
 # the version in the code
-try:
-    import importlib.metadata as importlib_metadata
-except ModuleNotFoundError:
-    import importlib_metadata
+import importlib.metadata as importlib_metadata
 
 LINKML = CurieNamespace('linkml', 'https://w3id.org/linkml/')
 TCCM = CurieNamespace('tccm', 'https://ontologies.r.us/tccm/')

pyproject.toml

@@ -59,7 +59,6 @@ pydantic = ">=1.10.2, <3.0.0"
 
 [tool.poetry.dev-dependencies]
 coverage = "^6.2"
-importlib-metadata = {version = "^4.12.0", python = "<3.8"}
 
 [build-system]
 requires = ["poetry-core>=1.0.0"]