Removed some dead code in the DFG bytecode parser
https://bugs.webkit.org/show_bug.cgi?id=113472

Reviewed by Sam Weinig.

Now that Phi creation and liveness analysis are separate passes, we can
remove the vestiges of code that used to do that in the bytecode
parser.

* dfg/DFGByteCodeParser.cpp:
(ByteCodeParser):
(JSC::DFG::ByteCodeParser::addToGraph):
(JSC::DFG::ByteCodeParser::parse):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@147053 268f45cc-cd09-0410-ab3c-d52691b4dbfc