Remove unused arguments from pg_replication_origin_xact_reset function.

The document specifies that pg_replication_origin_xact_reset function
doesn't have any argument variables. But previously it was actually
defined so as to have two argument variables, though they were not
used at all. That is, the pg_proc entry for that function was incorrect.
This patch fixes the pg_proc entry and removes those two arguments
from the function definition.

No back-patch because this change needs a catalog version bump
although the issue exists in 9.5 as well. Instead, a note about those
unused argument variables will be added to 9.5 document later.

Catalog version bumped due to the change of pg_proc.

Author: MasaoFujii

src/include/catalog/catversion.h

@@ -53,6 +53,6 @@
  */
 
 /*							yyyymmddN */
-#define CATALOG_VERSION_NO	201607071
+#define CATALOG_VERSION_NO	201608021
 
 #endif

src/include/catalog/pg_proc.h

@@ -5284,7 +5284,7 @@ DESCR("get the replication progress of the current session");
 DATA(insert OID = 6010 ( pg_replication_origin_xact_setup PGNSP PGUID 12 1 0 0 0 f f f f t f v r 2 0 2278 "3220 1184" _null_ _null_ _null_ _null_ _null_ pg_replication_origin_xact_setup _null_ _null_ _null_ ));
 DESCR("setup the transaction's origin lsn and timestamp");
 
-DATA(insert OID = 6011 ( pg_replication_origin_xact_reset PGNSP PGUID 12 1 0 0 0 f f f f t f v r 2 0 2278 "3220 1184" _null_ _null_ _null_ _null_ _null_ pg_replication_origin_xact_reset _null_ _null_ _null_ ));
+DATA(insert OID = 6011 ( pg_replication_origin_xact_reset PGNSP PGUID 12 1 0 0 0 f f f f t f v r 0 0 2278 "" _null_ _null_ _null_ _null_ _null_ pg_replication_origin_xact_reset _null_ _null_ _null_ ));
 DESCR("reset the transaction's origin lsn and timestamp");
 
 DATA(insert OID = 6012 ( pg_replication_origin_advance PGNSP PGUID 12 1 0 0 0 f f f f t f v u 2 0 2278 "25 3220" _null_ _null_ _null_ _null_ _null_ pg_replication_origin_advance _null_ _null_ _null_ ));