Remove redundant .claude/ entry from react_on_rails_pro/.gitignore

The .claude/ directory is created at the project root, not in subdirectories.
The root .gitignore already handles .claude/ with selective ignoring
(settings.local.json and .fuse_hidden*), making this subdirectory entry
unnecessary and inconsistent with the root ignore policy.

Author: ihabadham

react_on_rails_pro/.gitignore

@@ -75,5 +75,3 @@ yalc.lock
 
 # React on Rails Pro License Key
 config/react_on_rails_pro_license.key
-
-.claude/