Merge branch 'mw-fa-icon-classes-cleanup' into 'master'

Cleanup fa- classes

See merge request gitlab-org/gitlab!46010

app/assets/stylesheets/fontawesome_custom.scss

@@ -105,10 +105,6 @@
   content: '\f110';
 }
 
-.fa-trash-o::before {
-  content: '\f014';
-}
-
 .fa-caret-right::before {
   content: '\f0da';
 }
@@ -117,18 +113,10 @@
   content: '\f077';
 }
 
-.fa-bug::before {
-  content: '\f188';
-}
-
 .fa-exclamation-circle::before {
   content: '\f06a';
 }
 
-.fa-bell::before {
-  content: '\f0f3';
-}
-
 .fa-file-o::before {
   content: '\f016';
 }
@@ -141,10 +129,6 @@
   content: '\f111';
 }
 
-.fa-git::before {
-  content: '\f1d3';
-}
-
 .fa-thumb-tack::before {
   content: '\f08d';
 }
@@ -153,38 +137,6 @@
   content: '\f06d';
 }
 
-.fa-pause::before {
-  content: '\f04c';
-}
-
-.fa-play::before {
-  content: '\f04b';
-}
-
-.fa-share::before {
-  content: '\f064';
-}
-
-.fa-book::before {
-  content: '\f02d';
-}
-
-.fa-times-circle::before {
-  content: '\f057';
-}
-
-.fa-skype::before {
-  content: '\f17e';
-}
-
-.fa-linkedin-square::before {
-  content: '\f08c';
-}
-
-.fa-twitter-square::before {
-  content: '\f081';
-}
-
 .fa-file-pdf-o::before {
   content: '\f1c1';
 }
@@ -217,6 +169,14 @@
   content: '\f1c8';
 }
 
+.fa-square-o::before {
+  content: '\f096';
+}
+
+.fa-check-square-o::before {
+  content: '\f046';
+}
+
 .sr-only {
   position: absolute;
   width: 1px;