fix github icon in footer

assets/css/main.css

@@ -2228,14 +2228,6 @@
 		position: relative;
 	}
 
-		.icon:before {
-			-moz-osx-font-smoothing: grayscale;
-			-webkit-font-smoothing: antialiased;
-			font-family: FontAwesome;
-			font-style: normal;
-			font-weight: normal;
-			text-transform: none !important;
-		}
 
 		.icon > .label {
 			display: none;

footer.php

@@ -10,8 +10,9 @@
                     <?php echo sprintf( __( '%1$s %2$s %3$s. All Rights Reserved.', 'friendica' ), '&copy;', date( 'Y' ), esc_html( get_bloginfo( 'name' ) ) ); echo sprintf( __( ' Original Design: %1$s.', 'friendica' ), '<a href="https://templated.co">TEMPLATED</a>' ); ?>
                 </div>
                 <ul class="icons">
-                    <li><a href="https://github.com/friendica/" class="icon fa-github"><span class="label">GitGub</span></a></li>
-
+                    <li><a href="https://github.com/friendica/" title="GitHub">
+                        <i class="fa fa-github" aria-hidden="true"></i>
+                    </a></li>
                 </ul>
             </div>
         </div>