Remove unneeded call to all-makefiles-under

It was only added to prevent conflicts with downstream and it
is no longer needed downstream.

Bug: 32912773
Test: make checkbuild
Change-Id: Ifc28f20e1e759e91896eea9c50bd962c5956df85
diff --git a/Android.mk b/Android.mk
index 54323e0..e7645ef 100644
--- a/Android.mk
+++ b/Android.mk
@@ -46,5 +46,3 @@
     dexmaker-dex-target:lib/libcore-dex-2$(COMMON_JAVA_PACKAGE_SUFFIX) \
 
 include $(BUILD_MULTI_PREBUILT)
-
-include $(call all-makefiles-under,$(LOCAL_PATH))