Remove fixed F401 and F403 from .flake8 exclusions

.flake8

@@ -18,7 +18,6 @@ per-file-ignores =
     # F821 undefined name 'unicode'
     # F841 local variable assigned to but never used
     # E741 ambiguous variable name 'l'
-    __init__.py: F403
     man/build_html.py: E501
     doc/python/m.distance.py: E501
     gui/scripts/d.wms.py: E501
@@ -64,7 +63,6 @@ per-file-ignores =
     python/grass/pygrass/raster/__init__.py: E402
     python/grass/pygrass/vector/__init__.py: E402
     python/grass/pygrass/raster/category.py: E721
-    python/grass/pygrass/rpc/__init__.py: F403
     python/grass/pygrass/utils.py: E402
     python/grass/temporal/abstract_space_time_dataset.py: E722
     python/grass/temporal/c_libraries_interface.py: E722
@@ -84,9 +82,7 @@ per-file-ignores =
     python/grass/imaging/images2gif.py: E226
     # Unused imports in init files
     # F403 star import used; unable to detect undefined names
-    python/grass/*/__init__.py: F401, F403
-    python/grass/*/*/__init__.py: F403
-    python/grass/*/*/*/__init__.py: F403
+    python/grass/temporal/__init__.py: F401, F403
     # E402 module level import not at top of file
     scripts/r.semantic.label/r.semantic.label.py: E501
     scripts/db.out.ogr/db.out.ogr.py: F841