Remove ExecGetScanType function

This became unused in a191a16.

Author: alvherre

src/backend/executor/execUtils.c

@@ -712,18 +712,6 @@ ExecFreeExprContext(PlanState *planstate)
  * ----------------------------------------------------------------
  */
 
-/* ----------------
- *		ExecGetScanType
- * ----------------
- */
-TupleDesc
-ExecGetScanType(ScanState *scanstate)
-{
-	TupleTableSlot *slot = scanstate->ss_ScanTupleSlot;
-
-	return slot->tts_tupleDescriptor;
-}
-
 /* ----------------
  *		ExecAssignScanType
  * ----------------

src/include/executor/executor.h

@@ -344,7 +344,6 @@ extern ProjectionInfo *ExecBuildProjectionInfo(List *targetList,
 extern void ExecAssignProjectionInfo(PlanState *planstate,
 						 TupleDesc inputDesc);
 extern void ExecFreeExprContext(PlanState *planstate);
-extern TupleDesc ExecGetScanType(ScanState *scanstate);
 extern void ExecAssignScanType(ScanState *scanstate, TupleDesc tupDesc);
 extern void ExecAssignScanTypeFromOuterPlan(ScanState *scanstate);