Disconnect deleted paths from build.

Bug: 64219148
Test: build (stage-aosp-master)
Change-Id: Icd7c95d1b432cf62a801d4bb667e281572a6c131
diff --git a/core-utils/Android.mk b/core-utils/Android.mk
index b22c376..5ea200e 100644
--- a/core-utils/Android.mk
+++ b/core-utils/Android.mk
@@ -29,10 +29,7 @@
 LOCAL_SRC_FILES := \
     $(call all-java-files-under,gingerbread) \
     $(call all-java-files-under,kitkat) \
-    $(call all-java-files-under,api20) \
     $(call all-java-files-under,api21) \
-    $(call all-java-files-under,api23) \
-    $(call all-java-files-under,api24) \
     $(call all-java-files-under,java)
 LOCAL_RESOURCE_DIR := $(LOCAL_PATH)/res
 LOCAL_SHARED_ANDROID_LIBRARIES := \