Remove obsolete ENABLE_TREBLE references.

ENABLE_TREBLE compiler flags are no longer used. They have been replaced
with use of the VINTF object.

Bug: 32978887
Test: pass
Change-Id: I516b80733d467dfb7385c4db82f2179aa7908d9e
diff --git a/device-common.mk b/device-common.mk
index b541e8a..757059d 100644
--- a/device-common.mk
+++ b/device-common.mk
@@ -48,11 +48,6 @@
 PRODUCT_PACKAGES += \
     android.hardware.drm@1.0-impl \
 
-ifeq ($(ENABLE_TREBLE), true)
-PRODUCT_PACKAGES += \
-    android.hardware.drm@1.0-service
-endif
-
 # Set zygote config
 PRODUCT_DEFAULT_PROPERTY_OVERRIDES += ro.zygote=zygote64_32
 PRODUCT_COPY_FILES += system/core/rootdir/init.zygote64_32.rc:root/init.zygote64_32.rc