[mlir] Remove redundant declarations (NFC)#166896

kazutakahirata merged 1 commit intollvm:mainllvm/llvm-project:mainfrom

kazutakahirata:cleanup_20251106_clang_tidy_readability-redundant-declaration_mlirkazutakahirata/llvm-project:cleanup_20251106_clang_tidy_readability-redundant-declaration_mlirCopy head branch name to clipboard