Revert^4 "Add extension and agent for dumping internal jvmti plugin data."

This reverts commit a55e8b5c9827cc4dc4e7f7c7ee07ef1fdafc35e0.

Reason for revert: Fixed underlying issue causing libjdwp test
                   failure.
Test: ./test.py --host

Change-Id: Ibe831884192db42eb54b25364d31fa21f11fab26
diff --git a/openjdkjvmti/deopt_manager.h b/openjdkjvmti/deopt_manager.h
index 4c4a774..73a64be 100644
--- a/openjdkjvmti/deopt_manager.h
+++ b/openjdkjvmti/deopt_manager.h
@@ -33,6 +33,7 @@
 #define ART_OPENJDKJVMTI_DEOPT_MANAGER_H_
 
 #include <atomic>
+#include <iosfwd>
 #include <unordered_map>
 
 #include "base/mutex.h"
@@ -78,6 +79,8 @@
   void Setup();
   void Shutdown();
 
+  void DumpDeoptInfo(art::Thread* self, std::ostream& stream);
+
   void RemoveDeoptimizationRequester() REQUIRES(!deoptimization_status_lock_,
                                                 !art::Roles::uninterruptible_);
   void AddDeoptimizationRequester() REQUIRES(!deoptimization_status_lock_,