diff --git a/web/third/bootstrap/css/bootstrap.app.css b/web/third/bootstrap/css/bootstrap.app.css
index de79274d94..3f766a2f53 100644
--- a/web/third/bootstrap/css/bootstrap.app.css
+++ b/web/third/bootstrap/css/bootstrap.app.css
@@ -173,6 +173,3 @@ button.close {
   border: 0;
   -webkit-appearance: none;
 }
-@-ms-viewport {
-  width: device-width;
-}