Bug 1179063 - Cleanup: remove useless pn_index. (r=me)

js/src/frontend/BytecodeEmitter.cpp

@@ -5861,7 +5861,6 @@ BytecodeEmitter::emitFunction(ParseNode* pn, bool needsProto)
                    bi->kind() == Binding::ARGUMENT);
         MOZ_ASSERT(bi.argOrLocalIndex() < JS_BIT(20));
 #endif
-        pn->pn_index = index;
         if (!emitIndexOp(JSOP_LAMBDA, index))
             return false;
         MOZ_ASSERT(pn->getOp() == JSOP_GETLOCAL || pn->getOp() == JSOP_GETARG);

js/src/frontend/ParseNode.h

@@ -655,7 +655,6 @@ class ParseNode
 #define pn_cookie       pn_u.name.cookie
 #define pn_dflags       pn_u.name.dflags
 #define pn_blockid      pn_u.name.blockid
-#define pn_index        pn_u.name.blockid /* reuse as object table index */
 #define pn_head         pn_u.list.head
 #define pn_tail         pn_u.list.tail
 #define pn_count        pn_u.list.count