Remove duplicate extern declaration.

src/include/executor/nodeGroup.h

@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2000, PostgreSQL, Inc
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $Id: nodeGroup.h,v 1.13 2000/01/26 05:58:05 momjian Exp $
+ * $Id: nodeGroup.h,v 1.14 2000/01/26 23:48:05 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -22,7 +22,4 @@ extern int	ExecCountSlotsGroup(Group *node);
 extern void ExecEndGroup(Group *node);
 extern void ExecReScanGroup(Group *node, ExprContext *exprCtxt, Plan *parent);
 
-extern void ExecReScanGroup(Group *node, ExprContext *exprCtxt, Plan *parent);
-
-
 #endif	 /* NODEGROUP_H */