Remove another now-unused GUC.

src/backend/utils/misc/guc_gp.c

@@ -339,8 +339,6 @@ bool		gp_log_stack_trace_lines;
  */
 bool		dml_ignore_target_partition_check = false;
 
-bool		fts_diskio_check = false;
-
 /* Planner gucs */
 bool		gp_enable_hashjoin_size_heuristic = false;
 bool		gp_enable_fallback_plan = true;
@@ -2765,16 +2763,6 @@ struct config_bool ConfigureNamesBool_gp[] =
 		true, NULL, NULL
 	},
 
-	{
-		{"fts_diskio_check", PGC_USERSET, DEVELOPER_OPTIONS,
-			gettext_noop("Controls if FTS should perform disk IO checks on primary segments as part of probe"),
-			NULL,
-			GUC_NO_SHOW_ALL | GUC_NOT_IN_SAMPLE
-		},
-		&fts_diskio_check,
-		true, NULL, NULL
-	},
-
 	{
 		{"dml_ignore_target_partition_check", PGC_USERSET, DEVELOPER_OPTIONS,
 			gettext_noop("Ignores checking whether the user provided correct partition during a direct insert to a leaf partition"),

src/include/utils/guc.h

@@ -310,7 +310,6 @@ extern bool gp_partitioning_dynamic_selection_log;
 extern int gp_max_partition_level;
 
 extern bool gp_perfmon_print_packet_info;
-extern bool fts_diskio_check;
 
 extern bool gp_enable_relsize_collection;