[mlir] Remove unused using declaration (NFC)

diff --git a/mlir/unittests/TableGen/EnumsGenTest.cpp b/mlir/unittests/TableGen/EnumsGenTest.cpp
index 1b6f239..29d274c 100644 (file)
--- a/mlir/unittests/TableGen/EnumsGenTest.cpp
+++ b/mlir/unittests/TableGen/EnumsGenTest.cpp
@@ -28,7 +28,6 @@
 using Outer::Inner::ConvertToEnum;
 using Outer::Inner::ConvertToString;
 using Outer::Inner::FooEnum;
-using Outer::Inner::FooEnumAttr;
 
 TEST(EnumsGenTest, GeneratedStrEnumDefinition) {
   EXPECT_EQ(0u, static_cast<uint64_t>(FooEnum::CaseA));