Build: Remove extra images make file inclusion

Handling of extra image generation is moved to tasks

CRs-fixed: 548299

Change-Id: I5375f8a90223bc75d551fca4f480aabdbdc0bb33
diff --git a/AndroidBoard.mk b/AndroidBoard.mk
index 435caaf..580efe2 100755
--- a/AndroidBoard.mk
+++ b/AndroidBoard.mk
@@ -143,7 +143,9 @@
 #----------------------------------------------------------------------
 # extra images
 #----------------------------------------------------------------------
+ifeq (, $(wildcard vendor/qcom/build/tasks/generate_extra_images.mk))
 include device/qcom/common/generate_extra_images.mk
+endif
 
 #----------------------------------------------------------------------
 # pick up additional files for Tiny Android builds