A64: Remove a couple of already addressed TODOs.

src/a64/lithium-a64.cc

Index: src/a64/lithium-a64.cc
diff --git a/src/a64/lithium-a64.cc b/src/a64/lithium-a64.cc
index d9f51e2edb49bb3bbe45216cc25e8aa0296fa7ff..b3302667815b2acdc5ec6f6f08ccf70b916504dd 100644
--- a/src/a64/lithium-a64.cc
+++ b/src/a64/lithium-a64.cc
@@ -1246,8 +1246,6 @@ LInstruction* LChunkBuilder::DoCompareNumericAndBranch(
     HCompareNumericAndBranch* instr) {
   Representation r = instr->representation();
 
-  // TODO(all): This instruction has been replaced by HCompareNumericAndBranch
-  // on bleeding_edge. We should update when we'll do the rebase.
   if (r.IsSmiOrInteger32()) {
     ASSERT(instr->left()->representation().Equals(r));
     ASSERT(instr->right()->representation().Equals(r));