Cleanup unused plugins and fonts

Signed-off-by: Justin Georgi <justin.georgi@gmail.com>

src/css/icons.css

@@ -1,30 +1,3 @@
-/* Material Icons Font (for MD theme) */
-@font-face {
-  font-family: 'Material Icons';
-  font-style: normal;
-  font-weight: 400;
-  src: local('Material Icons'), local('MaterialIcons-Regular'),
-    url(../fonts/material-icons.woff2) format('woff2'),
-    url(../fonts/material-icons.woff) format('woff');
-}
-.material-icons {
-  font-family: 'Material Icons';
-  font-weight: normal;
-  font-style: normal;
-  font-size: 24px;
-  display: inline-block;
-  line-height: 1;
-  text-transform: none;
-  letter-spacing: normal;
-  word-wrap: normal;
-  white-space: nowrap;
-  direction: ltr;
-  -webkit-font-smoothing: antialiased;
-  text-rendering: optimizeLegibility;
-  -moz-osx-font-smoothing: grayscale;
-  font-feature-settings: 'liga';
-}
-
 /* Framework7 Icons Font (for iOS theme) */
 @font-face {
   font-family: 'Framework7 Icons';