setup: remove pytest-invenio to make imports cleaner

setup.cfg

@@ -41,8 +41,8 @@ tests =
     pytest-black-ng>=0.4.0
     pytest-cache>=1.0
     pytest-runner>=2.6.2
-    pytest-invenio>=1.4.0
     sphinx>=4.5
+    check-manifest>=0.42
 # Kept for backwards compatibility
 docs =