Remove old x64 code generator.

runtime/vm/compiler.h

Index: runtime/vm/compiler.h
===================================================================
--- runtime/vm/compiler.h	(revision 7349)
+++ runtime/vm/compiler.h	(working copy)
@@ -15,6 +15,7 @@
 class Class;
 class Function;
 class Library;
+class ParsedFunction;
 class RawInstance;
 class Script;
 class SequenceNode;
@@ -39,6 +40,12 @@
   // Returns Error::null() if there is no compilation error.
   static RawError* CompileOptimizedFunction(const Function& function);
 
+  // Generates code for given parsed function (without parsing it again) and
+  // sets its code field.
+  //
+  // Returns Error::null() if there is no compilation error.
+  static RawError* CompileParsedFunction(const ParsedFunction& parsed_function);
+
   // Generates and executes code for a given code fragment, e.g. a
   // compile time constant expression. Returns the result returned
   // by the fragment.