Revert "modify .gitignore entries"

This reverts commit 36551b161ba316851d9a56256aa13aec055c53cb.
Revert "adding gitignore and gitattributes to 5.2.x branch"

This reverts commit 20d86c390cf18f6e5b7ae335939bcc2127d24fba.
reindexing .gitignore