Remove old stylesheet and icon for tinymce editor

css/style.css

-/* DEFAULT button shortcode styles */
-a.button {
-  background: #ccc;
-  color: #fff;
-  text-decoration: none;
-  font-weight: bold;
-  padding: 20px 25px;
-  display: inline-block;
-  text-transform: uppercase;
-  margin: 5px 5px 5px 0;
-  border: 0;
-  /* SIZE button styles */
-  /* TYPE button styles */ }
-  a.button:hover, a.button:focus {
-    background: #b3b3b3; }
-  a.button.small {
-    padding: 10px 15px;
-    font-size: 0.9em; }
-  a.button.large {
-    padding: 30px 35px;
-    font-size: 1.2em; }
-  a.button.primary {
-    background: #226CFF; }
-    a.button.primary:hover, a.button.primary:focus {
-      background: #0050ee; }
-  a.button.warning {
-    background: #FF2247; }
-    a.button.warning:hover, a.button.warning:focus {
-      background: #ee0028; }
-  a.button.info {
-    background: #FFDA22; }
-    a.button.info:hover, a.button.info:focus {
-      background: #eec600; }
-  a.button.action {
-    background: #4FBE00; }
-    a.button.action:hover, a.button.action:focus {
-      background: #3a8b00; }
-
-/*# sourceMappingURL=style.css.map */

css/style.css.map

-{
-"version": 3,
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-"sources": ["../sass/lbd_button_shortcode.scss"],
-"names": [],
-"file": "style.css"
-}
\ No newline at end of file