Clear unused battle configure "disp_serverbank_msg"

conf/battle/misc.conf

@@ -146,7 +146,6 @@ mon_trans_disable_in_gvg: no
 discount_item_point_shop: 0
 
 // Don't display message "login-serv has been asked to %s the player '%.*s'." (Note 1)
-disp_serverbank_msg: no
 disp_servervip_msg: no
 
 // Delay to allow user resend new mail (default & minimum is 1000)

src/map/battle.c

@@ -8293,7 +8293,6 @@ static const struct _battle_data {
 	{ "feature.autotrade_head_direction",	&battle_config.feature_autotrade_head_direction,0,		-1,		2,				},
 	{ "feature.autotrade_sit",				&battle_config.feature_autotrade_sit,			1,		-1,		1,				},
 	{ "feature.autotrade_open_delay",		&battle_config.feature_autotrade_open_delay,	5000,	1000,	INT_MAX,		},
-	{ "disp_serverbank_msg",				&battle_config.disp_serverbank_msg,				0,		0,		1,				},
 	{ "disp_servervip_msg",					&battle_config.disp_servervip_msg,				0,		0,		1,				},
 	{ "warg_can_falcon",                    &battle_config.warg_can_falcon,                 0,      0,      1,              },
 	{ "path_blown_halt",                    &battle_config.path_blown_halt,                 1,      0,      1,              },

src/map/battle.h

@@ -565,7 +565,6 @@ extern struct Battle_Config
 	int fame_pharmacy_7;
 	int fame_pharmacy_10;
 
-	int disp_serverbank_msg;
 	int disp_servervip_msg;
 	int warg_can_falcon;
 	int path_blown_halt;