Revert "Support to open multiple files with the same name (different case of letters)"
Revert "Support to open multiple files with the same name (different case of letters)"

This reverts commit 84155cdbd3b56406cdecaafa49c070682db21335.

meganz/sdk,Acidburn0zzz/sdk,Acidburn0zzz/sdk,meganz/sdk,meganz/sdk,Acidburn0zzz/sdk,Acidburn0zzz/sdk,Acidburn0zzz/sdk,meganz/sdk,meganz/sdk,meganz/sdk,meganz/sdk,Acidburn0zzz/sdk,Acidburn0zzz/sdk,Acidburn0zzz/sdk