[CF 5739] Remove redundant comment regarding RelationBuildRowSecurity in relcache.c

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Patch(es): https://www.postgresql.org/message-id/8BD3D145-D880-49B9-9A5D-09EDEF5CEF4A@amazon.com
Author(s): Tanzeel Khan

Author: Commitfest Bot

src/backend/utils/cache/relcache.c

@@ -4328,10 +4328,7 @@ RelationCacheInitializePhase3(void)
 
 		/*
 		 * Re-load the row security policies if the relation has them, since
-		 * they are not preserved in the cache.  Note that we can never NOT
-		 * have a policy while relrowsecurity is true,
-		 * RelationBuildRowSecurity will create a single default-deny policy
-		 * if there is no policy defined in pg_policy.
+		 * they are not preserved in the cache.
 		 */
 		if (relation->rd_rel->relrowsecurity && relation->rd_rsdesc == NULL)
 		{