[mlir] Remove noexcept again from move constructors.

LLVM does not have the corresponding ClangTidy check enabled, so we
should not be fixing such findings.

Author: akuegel

mlir/include/mlir/IR/BuiltinAttributeInterfaces.h

@@ -35,7 +35,7 @@ struct ElementsAttrIndexer {
 public:
   ElementsAttrIndexer()
       : ElementsAttrIndexer(/*isContiguous=*/true, /*isSplat=*/true) {}
-  ElementsAttrIndexer(ElementsAttrIndexer &&rhs) noexcept
+  ElementsAttrIndexer(ElementsAttrIndexer &&rhs)
       : isContiguous(rhs.isContiguous), isSplat(rhs.isSplat) {
     if (isContiguous)
       conState = rhs.conState;

mlir/lib/Bindings/Python/TransformInterpreter.cpp

@@ -23,7 +23,7 @@ namespace py = pybind11;
 namespace {
 struct PyMlirTransformOptions {
   PyMlirTransformOptions() { options = mlirTransformOptionsCreate(); };
-  PyMlirTransformOptions(PyMlirTransformOptions &&other) noexcept {
+  PyMlirTransformOptions(PyMlirTransformOptions &&other) {
     options = other.options;
     other.options.ptr = nullptr;
   }