[mlir] Fix a warning

This patch fixes:

  mlir/lib/Dialect/MemRef/Utils/MemRefUtils.cpp:45:2: error: extra ';'
  outside of a function is incompatible with C++98
  [-Werror,-Wc++98-compat-extra-semi]

mlir/lib/Dialect/MemRef/Utils/MemRefUtils.cpp

diff --git a/mlir/lib/Dialect/MemRef/Utils/MemRefUtils.cpp b/mlir/lib/Dialect/MemRef/Utils/MemRefUtils.cpp
index 5e42602..2529bf7 100644
--- a/mlir/lib/Dialect/MemRef/Utils/MemRefUtils.cpp
+++ b/mlir/lib/Dialect/MemRef/Utils/MemRefUtils.cpp
@@ -42,7 +42,7 @@
 
   // All dims are unit-strided or size-1.
   return curDim < 0;
-};
+}
 
 } // namespace memref
 } // namespace mlir