hqd: virtual display code clean up

Remove V4L2 based virtual display functions as it is
no longer used.

Change-Id: Ibd7685791de6baa1bbf12ffe343443fcd7725269
diff --git a/libhwcomposer/Android.mk b/libhwcomposer/Android.mk
index ef7778b..c8229a8 100644
--- a/libhwcomposer/Android.mk
+++ b/libhwcomposer/Android.mk
@@ -11,7 +11,7 @@
 LOCAL_SHARED_LIBRARIES        := $(common_libs) libEGL liboverlay \
                                  libexternal libqdutils libhardware_legacy \
                                  libdl libmemalloc libqservice libsync \
-                                 libbinder libmedia libvirtual
+                                 libbinder libmedia
 
 ifeq ($(TARGET_USES_QCOM_BSP),true)
 LOCAL_SHARED_LIBRARIES += libskia