Remove GitHub issue reference from test comments

Removed reference to GitHub issue 920 in test case comments.

Author: zeckem19

gateway-ha/src/test/java/io/trino/gateway/ha/handler/TestRoutingTargetHandler.java

@@ -303,7 +303,6 @@ void testPropagateErrorsTrueResponseGroupAndErrorsSet()
     @Test
     void testResolveRoutingWithKnownQueryIdAndFailingFallback()
     {
-        // ref: https://github.com/trinodb/trino-gateway/issues/920
         // Simulate a request to /ui/query.html?queryId where the query ID is known
         // but the fallback routing (getRoutingTargetResponse) would fail because
         // there are no backends for the resolved routing group.
@@ -327,6 +326,7 @@ void testResolveRoutingWithKnownQueryIdAndFailingFallback()
                 .thenThrow(new IllegalStateException("Number of active backends found zero"));
 
         // With orElse(), this throws. With orElseGet(), this succeeds.
+        // ref: https://github.com/trinodb/trino-gateway/issues/920
         RoutingTargetResponse response = handler.resolveRouting(uiRequest);
 
         assertThat(response.routingDestination().clusterHost()).isEqualTo(backendUrl);