removed redundant styling from inherited class

Author: rparke

app/assets/stylesheets/components/placeholder.scss

@@ -17,9 +17,6 @@
 .placeholder-unsafe {
 
   @extend %placeholder;
-  border-radius: 0;
-  border-top-left-radius: 20px;
-  border-bottom-left-radius: 20px;
   border-top-right-radius: 0px;
   border-bottom-right-radius: 0px;
   box-shadow: inset 0.47em 0 0 0 #FFF, inset 0 -0.05em 0 0 #FFF, inset 0 0.26em 0 0 #FFF;