Remove WebStorm gitignore

This goes in a global gitignore file, not a project.

Author: timdorr

.gitignore

@@ -12,7 +12,6 @@ test/react/*/test/**/*.spec.js
 test/react/**/src
 test/jest-config.json
 lcov.info
-.idea/
 
 lib/core/metadata.js
 lib/core/MetadataBlog.js