Remove duplicated comment in nodeModifyTable.c

Author: Amul Sul
Discussion: https://postgr.es/m/CAAJ_b97badUU8_DHNoFCXZxF6YUk0Yb=53rrum168hd1haJgpQ@mail.gmail.com

Author: michaelpq

src/backend/executor/nodeModifyTable.c

@@ -1948,9 +1948,6 @@ ExecUpdatePrepareSlot(ResultRelInfo *resultRelInfo,
  * caller is also in charge of doing EvalPlanQual if the tuple is found to
  * be concurrently updated.  However, in case of a cross-partition update,
  * this routine does it.
- *
- * Caller is in charge of doing EvalPlanQual as necessary, and of keeping
- * indexes current for the update.
  */
 static TM_Result
 ExecUpdateAct(ModifyTableContext *context, ResultRelInfo *resultRelInfo,