Remove deprecated debugger code

runtime/include/dart_debugger_api.h

Index: runtime/include/dart_debugger_api.h
===================================================================
--- runtime/include/dart_debugger_api.h	(revision 42527)
+++ runtime/include/dart_debugger_api.h	(working copy)
@@ -33,11 +33,6 @@
 #define ILLEGAL_BREAKPOINT_ID 0
 
 
-// DEPRECATED -- use Dart_PausedEventHandler
-typedef void Dart_BreakpointHandler(Dart_IsolateId isolate_id,
-                                    Dart_Breakpoint breakpoint,
-                                    Dart_StackTrace stack_trace);
-
 typedef void Dart_ExceptionThrownHandler(Dart_IsolateId isolate_id,
                                          Dart_Handle exception_object,
                                          Dart_StackTrace stack_trace);
@@ -289,19 +284,7 @@
 
 
 /**
- * DEPRECATED -- use Dart_SetPausedEventHandler
- *
  * Installs a handler callback function that gets called by the VM
- * when a breakpoint has been reached.
- *
- * Requires there to be a current isolate.
- */
-DART_EXPORT void Dart_SetBreakpointHandler(
-                            Dart_BreakpointHandler bp_handler);
-
-
-/**
- * Installs a handler callback function that gets called by the VM
  * when a breakpoint location has been reached or when stepping.
  *
  * Requires there to be a current isolate.