Remove libpagemap include hack.

Change-Id: I4c75ae4e311342c9ab4f317026904f893e931384
diff --git a/tests/Android.mk b/tests/Android.mk
index 68c4149..e964a03 100644
--- a/tests/Android.mk
+++ b/tests/Android.mk
@@ -301,7 +301,6 @@
 
 bionic-unit-tests_c_includes := \
     bionic/libc \
-    $(call include-path-for, libpagemap) \
 
 bionic-unit-tests_shared_libraries_target := \
     libdl \