Remove duplicate ext4 flags from Android.mk

* They are right above

Change-Id: Ifff889e6ff748ed6bfa4a076b1afcc2c6a7eed3b
diff --git a/Android.mk b/Android.mk
index 9ad3507..e5220a5 100755
--- a/Android.mk
+++ b/Android.mk
@@ -179,14 +179,6 @@
 endif
 LOCAL_C_INCLUDES += external/libselinux/include
 LOCAL_SHARED_LIBRARIES += libselinux
-#ifneq ($(TARGET_USERIMAGES_USE_EXT4), true)
-#    LOCAL_CFLAGS += -DUSE_EXT4
-#    LOCAL_C_INCLUDES += system/extras/ext4_utils
-#    LOCAL_SHARED_LIBRARIES += libext4_utils
-#    ifneq ($(wildcard external/lz4/Android.mk),)
-#        LOCAL_STATIC_LIBRARIES += liblz4
-#    endif
-#endif
 
 ifeq ($(AB_OTA_UPDATER),true)
     LOCAL_CFLAGS += -DAB_OTA_UPDATER=1