FWU: Do not pull TFTF exception vectors code

NS_BL1U and NS_BL2U images have their own exception vectors code
provided by lib/${ARCH}/exception_stubs.S.

Change-Id: I5d2d760d9faf3d7bb4ba0bdefc5f20c193b1569d
Signed-off-by: Sandrine Bailleux <sandrine.bailleux@arm.com>
diff --git a/fwu/ns_bl1u/ns_bl1u.mk b/fwu/ns_bl1u/ns_bl1u.mk
index 0d7efcc..d5c7806 100644
--- a/fwu/ns_bl1u/ns_bl1u.mk
+++ b/fwu/ns_bl1u/ns_bl1u.mk
@@ -28,7 +28,6 @@
 NS_BL1U_SOURCES := $(addprefix tftf/framework/,		\
 	${ARCH}/arch.c					\
 	${ARCH}/asm_debug.S				\
-	${ARCH}/exceptions.S				\
 	debug.c						\
 )
 
diff --git a/fwu/ns_bl2u/ns_bl2u.mk b/fwu/ns_bl2u/ns_bl2u.mk
index 0605c3c..abd5ac5 100644
--- a/fwu/ns_bl2u/ns_bl2u.mk
+++ b/fwu/ns_bl2u/ns_bl2u.mk
@@ -28,7 +28,6 @@
 NS_BL2U_SOURCES := $(addprefix tftf/framework/,		\
 	${ARCH}/arch.c					\
 	${ARCH}/asm_debug.S				\
-	${ARCH}/exceptions.S				\
 	debug.c						\
 )