Orc: Suppress a warning in llvm#126691

Author: chapuni

llvm/lib/ExecutionEngine/Orc/TargetProcess/UnwindInfoManager.cpp

@@ -63,6 +63,7 @@ UnwindInfoManager::~UnwindInfoManager() {
       dbgs() << "Failed call to " << RemoveFnName << ": error = " << Err
              << "\n";
     });
+    (void)Err;
   }
 }