removing border-radius properly

less/bootstrap/variables.less

@@ -102,9 +102,9 @@
 @line-height-large:         1.33;
 @line-height-small:         1.5;
 
-@border-radius-base:        4px;
+@border-radius-base:        0;
-@border-radius-large:       6px;
+@border-radius-large:       0;
-@border-radius-small:       3px;
+@border-radius-small:       0;
 
 //** Global color for active items (e.g., navs or dropdowns).
 @component-active-color:    #fff;

less/style.less

@@ -54,10 +54,6 @@ a:hover, .btn-link:hover, .btn-link:active, .btn-link:focus {
 	text-decoration:none;
 }
 
-.btn {
-	border-radius: 0;
-}
-
 .alt-logins {
 	margin: 0 0 0 1em;
 	padding: 0;