Remove bug icon from comment card

Bug icon was added for easy reporting of ported comment bugs. The
feature has been live and stable for weeks so the bug icon can be
cleaned up.

Change-Id: Id5fb0a254e2d8912ea402018ce0252f612631db0

polygerrit-ui/app/elements/shared/gr-comment/gr-comment_html.ts

diff --git a/polygerrit-ui/app/elements/shared/gr-comment/gr-comment_html.ts b/polygerrit-ui/app/elements/shared/gr-comment/gr-comment_html.ts
index aad8c98..16605b3 100644
--- a/polygerrit-ui/app/elements/shared/gr-comment/gr-comment_html.ts
+++ b/polygerrit-ui/app/elements/shared/gr-comment/gr-comment_html.ts
@@ -269,12 +269,6 @@
               >From patchset [[comment.patch_set]]</span
             ></a
           >
-          <a
-            href="https://bugs.chromium.org/p/gerrit/issues/entry?template=Porting+Comments"
-            target="_blank"
-          >
-            <iron-icon icon="gr-icons:bug" title="report a problem"></iron-icon>
-          </a>
         </template>
         <gr-tooltip-content
           class="draftTooltip"