Remove overflow css rule from commit message

There was an issue where scroll bars would appear unecessarily in the
commit message. Because of word-wrapping, there is currently no reason
to need an overflow property, as this will not overflow.

Change-Id: I1a726bed78048a41107b67d2de4ef12cd8614a6c

polygerrit-ui/app/elements/change/gr-change-view/gr-change-view.html

@@ -122,7 +122,6 @@ limitations under the License.
         max-width: var(--commit-message-max-width, 72ch);;
       }
       .commitMessage gr-linked-text {
-        overflow: auto;
         word-break: break-all;
       }
       #commitMessageEditor {