hikey, hikey960: remove unused variable STRACE_PATH

STRACE_PATH is a leftover from before buildroot and is not used anymore
so remove it.

Signed-off-by: Jerome Forissier <jerome@forissier.org>
Reviewed-by: Etienne Carriere <etienne.carriere@linaro.org>
diff --git a/hikey.mk b/hikey.mk
index 01924a5..72ff9c4 100644
--- a/hikey.mk
+++ b/hikey.mk
@@ -49,7 +49,6 @@
 GRUB_PATH			?=$(ROOT)/grub
 LLOADER_PATH			?=$(ROOT)/l-loader
 PATCHES_PATH			?=$(ROOT)/patches_hikey
-STRACE_PATH			?=$(ROOT)/strace
 
 ################################################################################
 # Targets
diff --git a/hikey960.mk b/hikey960.mk
index b5b8f2a..5b46c1a 100644
--- a/hikey960.mk
+++ b/hikey960.mk
@@ -56,7 +56,6 @@
 IMAGE_TOOLS_PATH		?=$(ROOT)/tools-images-hikey960
 IMAGE_TOOLS_CONFIG		?=$(OUT_PATH)/config
 PATCHES_PATH			?=$(ROOT)/patches_hikey
-STRACE_PATH			?=$(ROOT)/strace
 
 ################################################################################
 # Targets