chore(.gitignore): rm outdated entries

Signed-off-by: Vaughn Dice <[email protected]>

Author: vdice

.gitignore

@@ -11,8 +11,3 @@ static/data.json
 static/hub-index-data.json
 # The build version of spin up hub
 spin-up-hub/dist/
-# The documentation migration backup files
-migration_scripts/content_backup/
-# The python compiled files
-migration_scripts/__pycache__
-migration_scripts/*.py[cod]