Rollback #11322 due to wrong syntax in mypy.ini. (#11332)

This was only checking the __init__ files in modules instead of
all files in a module, which don't pass yet.

changelog.d/11332.misc

@@ -0,0 +1 @@
+Add type hints to storage classes.

mypy.ini

@@ -175,7 +175,16 @@ disallow_untyped_defs = True
 [mypy-synapse.state.*]
 disallow_untyped_defs = True
 
-[mypy-synapse.storage]
+[mypy-synapse.storage.databases.main.client_ips]
+disallow_untyped_defs = True
+
+[mypy-synapse.storage.databases.main.room_batch]
+disallow_untyped_defs = True
+
+[mypy-synapse.storage.databases.main.user_erasure_store]
+disallow_untyped_defs = True
+
+[mypy-synapse.storage.util.*]
 disallow_untyped_defs = True
 
 [mypy-synapse.streams.*]
@@ -268,7 +277,10 @@ disallow_untyped_defs = True
 [mypy-synapse.util.versionstring]
 disallow_untyped_defs = True
 
-[mypy-tests]
+[mypy-tests.handlers.test_user_directory]
+disallow_untyped_defs = True
+
+[mypy-tests.storage.test_user_directory]
 disallow_untyped_defs = True
 
 [mypy-tests.rest.client.test_directory]