frontend: get rid of external font download for intranet deployments

frontend/css/front_app.less

@@ -1,3 +1,6 b''
+@import "vendors/less/bootstrap.less";
+@import (inline) "vendors/font-awesome.min.css";
+@import (inline) "vendors/c3.css";
 @import "front_shared.less";
 @import "sections/applications.css.less";
 @import "sections/dashboard.css.less";

frontend/css/front_shared.less

@@ -1,8 +1,3 b''
-@import (inline) "vendors/font-awesome.min.css";
-@import "vendors/less/bootstrap.less";
-@import (inline) "vendors/c3.css";
-@import url(https://fonts.googleapis.com/css?family=Ubuntu:400,500,700);
-
 @color_dark_blue: rgb(0, 42, 74);
 @color_med_blue: rgb(23, 96, 125);
 @color_beige: rgb(255, 241, 206);
@@ -75,7 +70,7 b' body {'
     height: 100%;
     margin: 0px;
     padding: 0px;
-    font-family: 'Ubuntu', "Helvetica Neue", Helvetica, Arial, sans-serif;
+    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
 }
 
 html {
@@ -114,10 +109,6 b' html {'
     background-image: url("/static/appenlight/images/footer_bg.png");
     color: @color_white;
 
-    strong {
-        font-family: 'Ubuntu', sans-serif;
-    }
-
     ul {
         padding: 0px;
         li {