Remove AUX support

This was deprecated in R, which has now branched, and there aren't any
users on master.

Test: build-aosp_crosshatch.ninja is the same (except for the removal of the empty auxiliary target)
Test: treehugger
Change-Id: I306156ab7f91cd4a2258554b4215766c99cd12d1
diff --git a/core/deprecation.mk b/core/deprecation.mk
index 19bd4cf..879505b 100644
--- a/core/deprecation.mk
+++ b/core/deprecation.mk
@@ -29,8 +29,6 @@
 # BUILD_BROKEN_USES_BUILD_* in your BoardConfig.mk in order to turn them back
 # to warnings.
 DEFAULT_ERROR_BUILD_MODULE_TYPES :=$= \
-  BUILD_AUX_EXECUTABLE \
-  BUILD_AUX_STATIC_LIBRARY \
   BUILD_COPY_HEADERS \
   BUILD_HOST_EXECUTABLE \
   BUILD_HOST_FUZZ_TEST \
@@ -46,6 +44,8 @@
 # These are BUILD_* variables that are always errors to reference.
 # Setting the BUILD_BROKEN_USES_BUILD_* variables is also an error.
 OBSOLETE_BUILD_MODULE_TYPES :=$= \
+  BUILD_AUX_EXECUTABLE \
+  BUILD_AUX_STATIC_LIBRARY \
   BUILD_HOST_SHARED_TEST_LIBRARY \
   BUILD_SHARED_TEST_LIBRARY \