Apply some ruff suggestions (#772)

RUF100 Unused blanket `noqa` directive

src/packaging/_manylinux.py

@@ -174,7 +174,7 @@ def _is_compatible(arch: str, version: _GLibCVersion) -> bool:
         return False
     # Check for presence of _manylinux module.
     try:
-        import _manylinux  # noqa
+        import _manylinux
     except ImportError:
         return True
     if hasattr(_manylinux, "manylinux_compatible"):