Revert "[MIPS] Support FR=0 emulation on FR=1 64-bit FP registers"

This reverts commit 40d9e7bf842423e328cda58e21ff5fc0cbab5c8a.

Bug: http://b/22045439
Change-Id: Ia9c56f65d35e404332a462f46460335cef39f0a4
diff --git a/linker/linker.h b/linker/linker.h
index 6f425e0..6042cb8 100644
--- a/linker/linker.h
+++ b/linker/linker.h
@@ -250,9 +250,7 @@
   bool mips_relocate_got(const VersionTracker& version_tracker,
                          const soinfo_list_t& global_group,
                          const soinfo_list_t& local_group);
-#if !defined(__LP64__)
-  bool mips_check_and_adjust_fp_modes();
-#endif
+
 #endif
   size_t ref_count_;
  public: