[CodeGen] Remove redundant ID in WinEHPrepareImpl (#74322)

Fix ppc build bot

Author: paperchalice

llvm/lib/CodeGen/WinEHPrepare.cpp

@@ -61,7 +61,6 @@ namespace {
 
 class WinEHPrepareImpl {
 public:
-  static char ID; // Pass identification, replacement for typeid.
   WinEHPrepareImpl(bool DemoteCatchSwitchPHIOnly)
       : DemoteCatchSwitchPHIOnly(DemoteCatchSwitchPHIOnly) {}