Revert "Export libicuuc_headers"

This reverts commit ae9a6b1b91ddfcf168dcc51f2ad7cb874f0e740c.

Change-Id: I46cf87fcb9bcca00ca9a434213d6158c433a455c
diff --git a/icu4c/source/common/Android.bp b/icu4c/source/common/Android.bp
index c363798..9555db7 100644
--- a/icu4c/source/common/Android.bp
+++ b/icu4c/source/common/Android.bp
@@ -258,9 +258,3 @@
     defaults: ["libicuuc_defaults"],
     static_libs: ["libicuuc_stubdata"],
 }
-
-cc_library_headers {
-    name: "libicuuc_headers",
-    host_supported: true,
-    export_include_dirs: ["."],
-}