Remove SHOW after datestyle reset.

src/test/regress/expected/horology-no-DST-before-1970.out

@@ -1124,5 +1124,3 @@ SELECT '' AS eight, f1 AS european_sql FROM ABSTIME_TBL;
 (8 rows)
 
 RESET DateStyle;
-SHOW DateStyle;
-NOTICE:  DateStyle is ISO with US (NonEuropean) conventions

src/test/regress/expected/horology-solaris-1947.out

@@ -1124,5 +1124,3 @@ SELECT '' AS eight, f1 AS european_sql FROM ABSTIME_TBL;
 (8 rows)
 
 RESET DateStyle;
-SHOW DateStyle;
-NOTICE:  DateStyle is ISO with US (NonEuropean) conventions

src/test/regress/expected/horology.out

@@ -1124,5 +1124,3 @@ SELECT '' AS eight, f1 AS european_sql FROM ABSTIME_TBL;
 (8 rows)
 
 RESET DateStyle;
-SHOW DateStyle;
-NOTICE:  DateStyle is ISO with US (NonEuropean) conventions

src/test/regress/sql/horology.sql

@@ -149,6 +149,3 @@ SELECT '' AS sixty_three, d1 AS european_sql FROM TIMESTAMP_TBL;
 SELECT '' AS eight, f1 AS european_sql FROM ABSTIME_TBL;
 
 RESET DateStyle;
-
-SHOW DateStyle;
-