qcom: Remove build timestamp injection on every build

Change-Id: If2d59c5792f8291f289f88e088621e32229bb682
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>

qcom/opensource/touch-drivers/Kbuild

@@ -243,5 +243,3 @@ ifneq ($(CONFIG_ARCH_PINEAPPLE), y)
 			obj-$(CONFIG_MSM_TOUCH) += raydium_ts.o
 	endif
 endif # pineapple
-
-CDEFINES += -DBUILD_TIMESTAMP=\"$(shell date -u +'%Y-%m-%dT%H:%M:%SZ')\"