Remove disabling gr-autocomplete

gr-autocomplete will never be present if it should be disabled.

Change-Id: I15916379db729c78761e2b55d4ddbc96ed6e1c26
diff --git a/rv-reviewers/rv-reviewer.html b/rv-reviewers/rv-reviewer.html
index 339eff7..10ab166 100644
--- a/rv-reviewers/rv-reviewer.html
+++ b/rv-reviewers/rv-reviewer.html
@@ -57,8 +57,7 @@
                 text="{{reviewer}}"
                 value="{{_reviewerSearchId}}"
                 query="[[_queryReviewers]]"
-                placeholder="Name Or Email"
-                disabled="[[_computeReviewerDisabled(reviewer, _originalReviewer)]]">
+                placeholder="Name Or Email">
             </gr-autocomplete>
         </span>
       </template>