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 93bf2f471d55795d0cdcf09cfe0f49a97bb274ba..ba1d2581b1f975154c2e3f176fe2e832325cba70 100644
--- a/src/parsing/parser.cc
+++ b/src/parsing/parser.cc
@@ -2503,10 +2503,10 @@ 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
+  // code produced for generators relies on this forced context allocation, but
+  // not in an essential way.
   scope()->ForceContextAllocation();
 
   // Calling a generator returns a generator object.  That object is stored