Remove pgsql FFTO tests from mysql84-g4

test/tap/groups/groups.json

@@ -252,14 +252,14 @@
   "test_ffto_mysql_large_resultsets-t" : [ "legacy-g4","mysql84-g4" ],
   "test_ffto_mysql_mixed_protocol-t" : [ "legacy-g4","mysql84-g4" ],
   "test_ffto_mysql_transactions-t" : [ "legacy-g4","mysql84-g4" ],
-  "test_ffto_pgsql-t" : [ "legacy-g4","mysql84-g4" ],
-  "test_ffto_pgsql_command_types-t" : [ "legacy-g4","mysql84-g4" ],
-  "test_ffto_pgsql_concurrent-t" : [ "legacy-g4","mysql84-g4" ],
-  "test_ffto_pgsql_errors-t" : [ "legacy-g4","mysql84-g4" ],
-  "test_ffto_pgsql_large_resultsets-t" : [ "legacy-g4","mysql84-g4" ],
-  "test_ffto_pgsql_mixed_protocol-t" : [ "legacy-g4","mysql84-g4" ],
-  "test_ffto_pgsql_pipeline-t" : [ "legacy-g4","mysql84-g4" ],
-  "test_ffto_pgsql_stmt_portal-t" : [ "legacy-g4","mysql84-g4" ],
+  "test_ffto_pgsql-t" : [ "legacy-g4" ],
+  "test_ffto_pgsql_command_types-t" : [ "legacy-g4" ],
+  "test_ffto_pgsql_concurrent-t" : [ "legacy-g4" ],
+  "test_ffto_pgsql_errors-t" : [ "legacy-g4" ],
+  "test_ffto_pgsql_large_resultsets-t" : [ "legacy-g4" ],
+  "test_ffto_pgsql_mixed_protocol-t" : [ "legacy-g4" ],
+  "test_ffto_pgsql_pipeline-t" : [ "legacy-g4" ],
+  "test_ffto_pgsql_stmt_portal-t" : [ "legacy-g4" ],
   "test_filtered_set_statements-t" : [ "legacy-g3","mysql84-g3","mysql-auto_increment_delay_multiplex=0-g3","mysql-multiplexing=false-g3","mysql-query_digests=0-g3","mysql-query_digests_keep_comment=1-g3" ],
   "test_firewall-t" : [ "legacy-g3","mysql84-g3","mysql-auto_increment_delay_multiplex=0-g3","mysql-multiplexing=false-g3","mysql-query_digests=0-g3","mysql-query_digests_keep_comment=1-g3" ],
   "test_flagOUT_weight-t" : [ "legacy-g3","mysql84-g3","mysql-auto_increment_delay_multiplex=0-g3","mysql-multiplexing=false-g3","mysql-query_digests=0-g3","mysql-query_digests_keep_comment=1-g3" ],