Revert "Turn on LTO for libc++.so"

This reverts commit 51a6acef395db893a6c693ac5daa9fb376c1c994.

Reason for revert: breaks soong_integration-clean: https://android-build.corp.google.com/build_explorer/branch_dashboard/aosp-master-bazel/build_id/10381995/?activeTarget=bp2build-incremental

Change-Id: I3974db37b32a86374e6309734decb169daa63c2e
diff --git a/Android.bp b/Android.bp
index c577256..c759964 100644
--- a/Android.bp
+++ b/Android.bp
@@ -172,9 +172,6 @@
     whole_static_libs: ["libc++_static"],
     stl: "none",
 
-    lto: {
-        thin: true,
-    },
     afdo: true,
 
     target: {