Fix bazel build.
diff --git a/iree/compiler/Codegen/SPIRV/KernelDispatchUtils.cpp b/iree/compiler/Codegen/SPIRV/KernelDispatchUtils.cpp
index e015ccd..e4b2540 100644
--- a/iree/compiler/Codegen/SPIRV/KernelDispatchUtils.cpp
+++ b/iree/compiler/Codegen/SPIRV/KernelDispatchUtils.cpp
@@ -339,7 +339,6 @@
   }
 
   std::array<int64_t, 3> workgroupSize = {subgroupSize, 1, 1};
-  int64_t lowerTs = workgroupSize[0];
   unsigned loopDepth = partitionedLoops.back() + 1;
   SmallVector<int64_t, 4> workgroupTileSize(loopDepth, 1),
       threadTileSize(loopDepth, 1);