Do not load fonts from googleapis.com since they are already included in edx-platform.

openassessment/xblock/static/sass/_openassessment.scss

@@ -41,7 +41,6 @@
 // utilities and assets (needed in this order to override xb variables)
 // --------------------
 @import 'themes/edx/utilities';                // theme-based utilities (variables, mixins, extends)
-@import 'themes/edx/assets';                   // theme-based assets (fonts, graphics/sprites, animations)
 
 
 // --------------------

openassessment/xblock/static/sass/themes/edx/_assets.scss

-// edX theme: assets
-// ====================
-
-// NOTES:
-// * This is where any edX-theme related assets (fonts, graphics/sprites, and animations) are defined
-
-
-// --------------------
-// font: Open Sans - http://www.google.com/fonts/specimen/Open+Sans
-// --------------------
-@import url(//fonts.googleapis.com/css?family=Open+Sans:300italic,400italic,600italic,700italic,400,300,600,700);
-
-
-// --------------------
-// EXAMPLE: image - edX logo
-// --------------------
-// $logo--edx: '../images/logo--edx.png';