Remove *.import from .gitignore to allow versioning of .import files.

These are important for Godot to import the project correctly.

From the documentation:
"Importing will add an extra <asset>.import file, containing the import configuration. Make sure to commit these to your version control system!"

https://docs.godotengine.org/en/3.0/getting_started/workflow/assets/import_process.html#files-generated

.gitignore

@@ -10,4 +10,3 @@ export_presets.cfg
 .mono/
 data_*/
 
-*.import