Revmove transition property from .cover

Author: mohammedsahl

src/themes/basic/_layout.styl

@@ -441,7 +441,6 @@ body.close
   body.close
     .sidebar, .cover
       transform translateX($sidebar-width)
-      transition transform 250ms ease-out
 
     .sidebar-toggle
       background-color rgba($color-bg, 0.8)