Remove Roboto Google web font

static/css/custom-variables.less

@@ -10,7 +10,7 @@
 
 @el-page-header-color: #8B0000;
 
-@font-family-monospace: Roboto, Menlo, Monaco, Consolas, "Courier New", monospace;
+@font-family-monospace: Menlo, Monaco, Consolas, "Courier New", monospace;
 @font-family-sans-serif:  'Helvetica Neue', Helvetica, Arial, Sans-Serif;
 @font-family-serif: 'PT Serif', Georgia, 'Times New Roman', Times, Serif;
 @grid-float-breakpoint: @screen-md-min;