Remove a few redundant tables from test cases.

src/test/regress/expected/case_gp.out

@@ -415,7 +415,6 @@ order by gid;
  G      | 
 (6 rows)
 
-drop table case_genders;
 select CASE 'M'
     WHEN IS NOT DISTINCT FROM 'M' THEN 'Male'
     WHEN IS NOT DISTINCT FROM 'F' THEN 'Female'
@@ -437,14 +436,6 @@ select CASE null
  Other
 (1 row)
 
-create table case_genders (gid integer, gender char(1)) distributed by (gid);
-insert into case_genders(gid, gender) values
-  (1, 'F'),
-  (2, 'M'),
-  (3, 'Z'),
-  (4, ''),
-  (5, null),
-  (6, 'G');
 select gender, CASE gender
     WHEN IS NOT DISTINCT FROM 'M' THEN 'Male'
     WHEN IS NOT DISTINCT FROM 'F' THEN 'Female'

src/test/regress/expected/decode_expr.out

@@ -1133,26 +1133,10 @@ select * from decode_view order by region, country_code;
 (5 rows)
 
 --
-begin;
-create table office2
-(
-   locid integer,
-   bus_name text,
-   country_code char(2)
-);
-NOTICE:  Table doesn't have 'DISTRIBUTED BY' clause -- Using column named 'locid' as the Greenplum Database data distribution key for this table.
-HINT:  The 'DISTRIBUTED BY' clause determines the distribution of data. Make sure column(s) chosen are the optimal data distribution key to minimize skew.
-insert into office2(locid, bus_name, country_code) values
-  (1000, 'Test Solutions', 'CN'),
-  (1011, 'Taing Consulting', 'US'),
-  (2000, 'Parts Plus', 'IT'),
-  (1055, 'Computers Unlimited', 'IL'),
-  (2005, 'Kangaroos Inc.', 'AU');
-commit;
 select locid,
        bus_name,
        country_code
-from office2
+from locations
 where  decode(country_code, 'US', 'Americas', 'CA', 'Americas', 'MX', 'Americas',
                 'CN', 'APJ', 'JP', 'APJ', 'RU', 'APJ', 'UK', 'EMEA', 'FR', 'EMEA',
                'IL', 'EMEA', 'IT', 'EMEA', 'IE', 'EMEA') = 'EMEA'

src/test/regress/sql/case_gp.sql

@@ -202,8 +202,6 @@ select gender, CASE gender
 from case_genders
 order by gid;
 
-drop table case_genders;
-
 select CASE 'M'
     WHEN IS NOT DISTINCT FROM 'M' THEN 'Male'
     WHEN IS NOT DISTINCT FROM 'F' THEN 'Female'
@@ -217,16 +215,6 @@ select CASE null
     WHEN IS NOT DISTINCT FROM '' THEN 'Not Specified'
     ELSE 'Other' END;
 
-create table case_genders (gid integer, gender char(1)) distributed by (gid);
-
-insert into case_genders(gid, gender) values
-  (1, 'F'),
-  (2, 'M'),
-  (3, 'Z'),
-  (4, ''),
-  (5, null),
-  (6, 'G');
-
 select gender, CASE gender
     WHEN IS NOT DISTINCT FROM 'M' THEN 'Male'
     WHEN IS NOT DISTINCT FROM 'F' THEN 'Female'

src/test/regress/sql/decode_expr.sql

@@ -761,26 +761,11 @@ order by locid, country_code;
 select * from decode_view order by region, country_code;
 
 --
-begin;
-create table office2
-(
-   locid integer,
-   bus_name text,
-   country_code char(2)
-);
-
-insert into office2(locid, bus_name, country_code) values
-  (1000, 'Test Solutions', 'CN'),
-  (1011, 'Taing Consulting', 'US'),
-  (2000, 'Parts Plus', 'IT'),
-  (1055, 'Computers Unlimited', 'IL'),
-  (2005, 'Kangaroos Inc.', 'AU');
-commit;
 
 select locid,
        bus_name,
        country_code
-from office2
+from locations
 where  decode(country_code, 'US', 'Americas', 'CA', 'Americas', 'MX', 'Americas',
                 'CN', 'APJ', 'JP', 'APJ', 'RU', 'APJ', 'UK', 'EMEA', 'FR', 'EMEA',
                'IL', 'EMEA', 'IT', 'EMEA', 'IE', 'EMEA') = 'EMEA'