Remove unused variable

runtime/vm/flow_graph_compiler_mips.cc

Index: runtime/vm/flow_graph_compiler_mips.cc
diff --git a/runtime/vm/flow_graph_compiler_mips.cc b/runtime/vm/flow_graph_compiler_mips.cc
index a8e408e31d93e40fc30e09c45b25aed365a26485..afaf6bce035cf54789df184b1758dadc0f5b1d29 100644
--- a/runtime/vm/flow_graph_compiler_mips.cc
+++ b/runtime/vm/flow_graph_compiler_mips.cc
@@ -1557,7 +1557,6 @@ int FlowGraphCompiler::EmitTestAndCallCheckCid(Label* next_label,
                                                const CidRange& range,
                                                int bias) {
   intptr_t cid_start = range.cid_start;
-  intptr_t cid_end = range.cid_end;
   if (range.IsSingleCid()) {
     __ BranchNotEqual(T2, Immediate(cid_start - bias), next_label);
   } else {
@@ -1565,7 +1564,7 @@ int FlowGraphCompiler::EmitTestAndCallCheckCid(Label* next_label,
     bias = cid_start;
     // TODO(erikcorry): We should use sltiu instead of the temporary TMP if
     // the range is small enough.
-    __ LoadImmediate(TMP, cid_end - cid_end);

[kustermann, 2017/05/19 07:59:42]

end - end :)

+    __ LoadImmediate(TMP, range.Extent());
     // Reverse comparison so we get 1 if biased cid > tmp ie cid is out of
     // range.
     __ sltu(TMP, TMP, T2);