Cleanups, refactoring in anticipation of new string interpolation nodes. Removed unnecessary code.

runtime/vm/intermediate_language.cc

Index: runtime/vm/intermediate_language.cc
===================================================================
--- runtime/vm/intermediate_language.cc	(revision 28616)
+++ runtime/vm/intermediate_language.cc	(working copy)
@@ -1871,7 +1871,6 @@
 
 
 void StaticCallInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
-  Label skip_call;
   if (!compiler->is_optimizing()) {
     // Some static calls can be optimized by the optimizing compiler (e.g. sqrt)
     // and therefore need a deoptimization descriptor.
@@ -1885,7 +1884,6 @@
                                ArgumentCount(),
                                argument_names(),
                                locs());
-  __ Bind(&skip_call);
 }