Remove unused .gitignore entries

Author: domdfcoding

.gitignore

@@ -85,13 +85,6 @@ profile_default/
 ipython_config.py
 Pipfile.lock
 .pyre/
-pathtype_demo.py
-addedin.py
 demo.py
 frozendict.py
-mutdef_plugin.py
-mutdef.py
-narrows_type.py
-count_demo.py
-_test_dates_fake_importerror.py.old
-coverage_fixup.py
+graaltest.sh

repo_helper.yml

@@ -73,13 +73,6 @@ tox_unmanaged:
  - flake8
 
 additional_ignore:
- - pathtype_demo.py
- - addedin.py
  - demo.py
  - frozendict.py
- - mutdef_plugin.py
- - mutdef.py
- - narrows_type.py
- - count_demo.py
- - _test_dates_fake_importerror.py.old
- - coverage_fixup.py
+ - graaltest.sh