remove images that don't exist from displayer css

h/css/displayer.css

@@ -329,11 +329,6 @@ span.errorMsg {
   .btn-link:hover {
     color: #bd1c2b; }
 
-/* line 121, common.scss */
-.btn-twitter {
-  background: url("../images/sign-in-with-twitter-l.png");
-  display: inline-block; }
-
 /* line 126, common.scss */
 .red {
   color: #bd1c2b; }
@@ -406,12 +401,6 @@ span.errorMsg {
     /* line 203, common.scss */
     .annotator-controls a.hyp-flag {
       background-image: url("../images/flag_1.png"); }
-    /* line 207, common.scss */
-    .annotator-controls a.annotator-save {
-      background-image: url("../images/submit_1.png"); }
-    /* line 211, common.scss */
-    .annotator-controls a.annotator-cancel {
-      background-image: url("../images/delete_1.png"); }
 
 /* line 220, common.scss */
 .a-tabs {
@@ -787,9 +776,6 @@ body {
       /* line 60, site.css.scss */
       #stream .tile .control:hover {
         opacity: .8; }
-      /* line 63, site.css.scss */
-      #stream .tile .control .fave {
-        background-image: url("../images/fave_2.png"); }
       /* line 66, site.css.scss */
       #stream .tile .control .goto {
         text-decoration: none;
@@ -803,9 +789,6 @@ body {
         padding-left: 0;
         padding-right: 1.3em;
         float: right;}
-      /* line 71, site.css.scss */
-      #stream .tile .control .flag {
-        background-image: url("../images/flag_4.png"); }
     /* line 75, site.css.scss */
     #stream .tile .sidepanel {
       position: absolute;