remove input group overrides since they're defaults now

Author: mdo

scss/_input-group.scss

@@ -43,12 +43,6 @@
   .custom-file {
     display: flex;
     align-items: center;
-    width: 100%;
-
-    .custom-file-input {
-      width: 100%;
-      min-width: 0;
-    }
 
     &:not(:first-child):not(:last-of-type) .custom-file-control,
     &:not(:first-child):not(:last-of-type) .custom-file-control::before { @include border-radius(0); }
@@ -57,10 +51,6 @@
     &:last-of-type:not(:first-child) .custom-file-control,
     &:last-of-type:not(:first-child) .custom-file-control::before { @include border-left-radius(0); }
   }
-
-  .custom-select {
-    width: 100%;
-  }
 }