Remove unused line.

Change-Id: Ib009e65265378c143dbf65866ad5392e38f3fc7c
diff --git a/plat/imx/imx8mq/gpc.c b/plat/imx/imx8mq/gpc.c
index b37550b..2ff0fed 100644
--- a/plat/imx/imx8mq/gpc.c
+++ b/plat/imx/imx8mq/gpc.c
@@ -93,8 +93,6 @@
 	0xec0, 0xf00, 0xf40,
 };
 
-spinlock_t gpc_imr_lock[4];
-
 DEFINE_BAKERY_LOCK(gpc_lock);
 
 void imx_gpc_set_m_core_pgc(unsigned int offset, bool pdn)