Clean up some random TODO(titzer)s and spelling mistakes.

src/deoptimizer.cc

Index: src/deoptimizer.cc
diff --git a/src/deoptimizer.cc b/src/deoptimizer.cc
index 1e3ff146b5be80b615df6df0a8df9ac2deb85bdd..ba77292279f2d7a0f5da22625d33ce543d8bc12d 100644
--- a/src/deoptimizer.cc
+++ b/src/deoptimizer.cc
@@ -383,8 +383,8 @@ void Deoptimizer::DeoptimizeMarkedCodeForContext(Context* context) {
     element = next;
   }
 
-  // TODO(titzer): we need a handle scope only because of the macro assembler,
-  // which is only used in EnsureCodeForDeoptimizationEntry.
+  // We need a handle scope only because of the macro assembler,
+  // which is used in code patching in EnsureCodeForDeoptimizationEntry.
   HandleScope scope(isolate);
 
   // Now patch all the codes for deoptimization.