Removed .css from .css.scss from files which were causing deprecation warning

app/assets/stylesheets/mastodon.css.scss

@@ -1,45 +0,0 @@
-@font-face {
-  font-family: 'mastodon';
-  src: font-url('mastodon.eot');
-  src: local('☺'),
-       font-url('mastodon.otf') format('opentype'),
-       font-url('mastodon.woff') format('woff'),
-       font-url('mastodon.ttf') format('truetype'),
-       font-url('mastodon.svg') format('svg');
-  font-weight: normal;
-  font-style: normal;
-}
-
- [class^="icon-"]:before, [class*=" icon-"]:before {
-  font-family: "mastodon";
-  font-style: normal;
-  font-weight: normal;
-  speak: none;
-
-  display: inline-block;
-  text-decoration: inherit;
-  width: 1em;
-  margin-right: .2em;
-  text-align: center;
-  /* opacity: .8; */
-
-  /* For safety - reset parent styles, that can break glyph codes*/
-  font-variant: normal;
-  text-transform: none;
-
-  /* fix buttons height, for twitter bootstrap */
-  line-height: 1em;
-
-  /* you can be more comfortable with increased icons size */
-  /* font-size: 120%; */
-
-  /* Font smoothing. That was taken from TWBS */
-  -webkit-font-smoothing: antialiased;
-  -moz-osx-font-smoothing: grayscale;
-
-  /* Uncomment for 3D effect */
-  /* text-shadow: 1px 1px 1px rgba(127, 127, 127, 0.3); */
-}
-
-.icon-mastodon:before { content: '\e800'; } /* '' */
-.icon-mastodon_alt:before { content: '\e801'; } /* '' */