Removed pull classes will use flex box to layout navbar instead.

Author: Joshua Barnett

src/app/material-docs-app.scss

@@ -16,11 +16,3 @@ app-navbar {
   position: relative;
   z-index: 10;
 }
-
-.pull-right {
-  float: right;
-}
-
-.pull-left {
-  float: left;
-}