Remove unnecessary duplicate

* We disable multithreaded dexopt for all builds by default now.

Change-Id: I05c01c3b7911fa8e6d3e9410f5d1cc800292ebda
diff --git a/config/common.mk b/config/common.mk
index 3ac9f8a..ae21644 100644
--- a/config/common.mk
+++ b/config/common.mk
@@ -338,12 +338,6 @@
 PRODUCT_PROPERTY_OVERRIDES += \
   ro.cm.display.version=$(CM_DISPLAY_VERSION)
 
-# disable multithreaded dextop for RELEASE and SNAPSHOT builds
-ifneq ($(filter RELEASE SNAPSHOT,$(CM_BUILDTYPE)),)
-PRODUCT_PROPERTY_OVERRIDES += \
-  persist.sys.dalvik.multithread=false
-endif
-
 -include $(WORKSPACE)/build_env/image-auto-bits.mk
 
 -include vendor/cyngn/product.mk