Revert "Export libxml2_headers"

This reverts commit a96ff887c09cd5ad37cb64473e50e5675a3da0de.

Change-Id: I749c763eb9c1cc8fda1fe9f4e11e656cdb7ca042
diff --git a/Android.bp b/Android.bp
index d4cc074..d3f313b 100644
--- a/Android.bp
+++ b/Android.bp
@@ -76,7 +76,7 @@
         "xmlmodule.c",
         "schematron.c",
     ],
-    export_include_dirs: ["include", "include/libxml"],
+    export_include_dirs: ["include"],
     cflags: [
         "-DLIBXML_THREAD_ENABLED=1",
 
@@ -96,8 +96,3 @@
     },
     shared_libs: ["libicuuc"],
 }
-
-cc_library_headers {
-    name: "libxml2_headers",
-    export_include_dirs: ["include", "include/libxml"],
-}