removed duplicate keys which are not as per the official layout

Author: ving-sh

frontend/static/layouts/tamil99.json

@@ -22,8 +22,8 @@
       ["ஈ", "ஷ"],
       ["ஊ", "ஜ"],
       ["ஐ", "ஹ"],
-      ["ஏ", "ஏ"],
-      ["ள", "ள"],
+      ["ஏ"],
+      ["ள"],
       ["ற", "ஶ"],
       ["ன", ":"],
       ["ட", "["],