Remove no-unused-variable rule to fix CSS hot-reloading

See wmonk/create-react-app-typescript#250

Author: davidisaaclee

tslint.json

@@ -11,7 +11,6 @@
 		"interface-name" : false,
 		"ordered-imports" : false,
 		"object-literal-sort-keys": false,
-		"no-unused-variable": true,
 		"no-console": false,
 		"no-bitwise": false,
 		"no-empty-interface": false,