Disable twbs buttons and glyphicons

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/assets/stylesheets/gl_bootstrap.scss

@@ -13,11 +13,9 @@
 @import "bootstrap/grid";
 @import "bootstrap/tables";
 @import "bootstrap/forms";
-@import "bootstrap/buttons";
 
 // Components
 @import "bootstrap/component-animations";
-@import "bootstrap/glyphicons";
 @import "bootstrap/dropdowns";
 @import "bootstrap/button-groups";
 @import "bootstrap/input-groups";