tc: Remove ARM_ARCH_FEATURE from TC3 build configs

These optional architectural extensions are normally enabled
by default in the compilers. The ARM_ARCH_FEATURE option is not
strictly necessary, make the build configurations clearer
by removing it.

Change-Id: Id2108653c868d6fb17cd4c464bcefdfae7de053d
Signed-off-by: David Vincze <david.vincze@arm.com>
diff --git a/tf_config/fvp-tc3-sve b/tf_config/fvp-tc3-sve
index 4088594..1c1fbfd 100644
--- a/tf_config/fvp-tc3-sve
+++ b/tf_config/fvp-tc3-sve
@@ -9,6 +9,5 @@
 ENABLE_MPMM=1
 ENABLE_SVE_FOR_NS=1
 ENABLE_SVE_FOR_SWD=1
-ARM_ARCH_FEATURE=sve
 ARM_GPT_SUPPORT=1
 SCP_BL2=/dev/null
diff --git a/tftf_config/fvp-tc3-cpu-extensions+sve b/tftf_config/fvp-tc3-cpu-extensions+sve
index 59ea82e..0876d20 100644
--- a/tftf_config/fvp-tc3-cpu-extensions+sve
+++ b/tftf_config/fvp-tc3-cpu-extensions+sve
@@ -1,4 +1,3 @@
-ARM_ARCH_FEATURE=memtag+sve
 ARM_ARCH_MAJOR=8
 ARM_ARCH_MINOR=7
 CROSS_COMPILE=aarch64-none-elf-