Revert "[CGObjC] Add run line for release mode in test arc-exceptions-seh.mm (NFC)"

This reverts commit 01023bfc. The extended test now triggers undefined behavior:
```
/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/lib/Transforms/ObjCARC/ObjCARCOpts.cpp:577:41: runtime error: load of value 180, which is not a valid value for type 'bool'
    #0 0xaaaae3333a30 in hasCFGChanged /b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/lib/Transforms/ObjCARC/ObjCARCOpts.cpp:577:41
    #1 0xaaaae3333a30 in llvm::ObjCARCOptPass::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) /b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/lib/Transforms/ObjCARC/ObjCARCOpts.cpp:2494:26
    ...
```