Remove some leftovers of full-codegen's generators implementation.

src/parsing/parser.cc

Index: src/parsing/parser.cc
diff --git a/src/parsing/parser.cc b/src/parsing/parser.cc
index 79d06da50750fca179203bb8abd768b07043d76d..e67763f8e69c518577e079df0e10cc7ef2c927d7 100644
--- a/src/parsing/parser.cc
+++ b/src/parsing/parser.cc
@@ -2488,10 +2488,10 @@ void Parser::ReindexLiterals(const ParserFormalParameters& parameters) {
 }
 
 void Parser::PrepareGeneratorVariables(FunctionState* function_state) {
-  // For generators, allocating variables in contexts is currently a win
-  // because it minimizes the work needed to suspend and resume an
-  // activation.  The machine code produced for generators (by full-codegen)
-  // relies on this forced context allocation, but not in an essential way.
+  // For generators, allocating variables in contexts is currently a win because
+  // it minimizes the work needed to suspend and resume an activation.  The
+  // machine code produced for generators relies on this forced context

[Michael Starzinger, 2016/11/21 15:56:16]

nit: s/machine code/code/ here because it is technically bytecode that is being
produced.

[neis, 2016/11/22 13:18:53]

Done.

+  // allocation, but not in an essential way.
   scope()->ForceContextAllocation();
 
   // Calling a generator returns a generator object.  That object is stored