[AMDGPU] Fix -Wunused-variable after rL352978

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@352982 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp b/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp
index 9874d7b..7ab9e30 100644
--- a/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp
+++ b/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp
@@ -443,7 +443,6 @@
       })
     .widenScalarIf(
       [=](const LegalityQuery &Query) {
-        const LLT &Ty0 = Query.Types[0];
         const LLT &Ty1 = Query.Types[1];
         return (Ty1.getScalarSizeInBits() < 16);
       },