angler: remove USE_CLANG_PLATFORM_BUILD

* clang is used by default now

Change-Id: I808396d35c1463c01f03df3bd6d299c80c2c98bc
Signed-off-by: Lennart Wieboldt <lennart.1997@gmx.de>
diff --git a/BoardConfig.mk b/BoardConfig.mk
index 4f1ab5e..6697461 100644
--- a/BoardConfig.mk
+++ b/BoardConfig.mk
@@ -126,8 +126,6 @@
 # Testing related defines
 BOARD_PERFSETUP_SCRIPT := platform_testing/scripts/perf-setup/angler-setup.sh
 
-USE_CLANG_PLATFORM_BUILD := true
-
 TARGET_FS_CONFIG_GEN += device/huawei/angler/config.fs
 
 -include vendor/huawei/angler/BoardConfigVendor.mk