[MC][ELF] Fix unused variable warning (NFC)
GCC warning:
```
/llvm-project/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp: In member function ‘virtual llvm::MCSection* llvm::TargetLoweringObjectFileELF::getSectionForLSDA(const llvm::Function&, const llvm::MCSymbol&, const llvm::TargetMachine&) const’:
/llvm-project/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp:871:8: warning: variable ‘IsComdat’ set but not used [-Wunused-but-set-variable]
871 | bool IsComdat = false;
| ^~~~~~~~
```
GitOrigin-RevId: 796feb61637c407aefcc0d462f24a1cc41f350d8
1 file changed
