twitter-server: remove index.css's "form input" selector

Problem

RB 779102 changed index.css to set the width for all elements matching `table input`. This has negative effects on other elements rendered in the twitter-server admin page outside of the intended effect.

Solution

Remove that rule, since it didn't affect any elements anyway (.form-control took precedence)

Result

The "Events" page still renders as it should, and other pages are not affected by that CSS rule.

RB_ID=788778

src/main/resources/twitter-server/css/index.css

@@ -210,10 +210,6 @@ caption {
   text-align: left;
 }
 
-table input {
-  width: 95%;
-}
-
 .filter-input-group {
   position: relative;
   display: inline-block;