remove some un-used grid class resets in input groups

scss/_input-group.scss

@@ -12,13 +12,6 @@
   display: table;
   border-collapse: separate; // prevent input groups from inheriting border styles from table cells when placed within a table
 
-  // Undo padding and float of grid classes
-  &[class*="col-"] {
-    float: none;
-    padding-right: 0;
-    padding-left: 0;
-  }
-
   .form-control {
     // Ensure that the input is always above the *appended* addon button for
     // proper border colors.