Revert "[RemoveDIs] Add additional debug-mode verifier checks" (#84757)

Reverts #84308

Failing bots, e.g.
https://lab.llvm.org/buildbot/#/builders/16/builds/62432

llvm/lib/IR/Verifier.cpp

@@ -2691,11 +2691,6 @@ void Verifier::visitFunction(const Function &F) {
   Check(verifyAttributeCount(Attrs, FT->getNumParams()),
         "Attribute after last parameter!", &F);
 
-  CheckDI(F.IsNewDbgInfoFormat == F.getParent()->IsNewDbgInfoFormat,
-          "Function debug format should match parent module", &F,
-          F.IsNewDbgInfoFormat, F.getParent(),
-          F.getParent()->IsNewDbgInfoFormat);
-
   bool IsIntrinsic = F.isIntrinsic();
 
   // Check function attributes.
@@ -3039,11 +3034,6 @@ void Verifier::visitBasicBlock(BasicBlock &BB) {
     Check(I.getParent() == &BB, "Instruction has bogus parent pointer!");
   }
 
-  CheckDI(BB.IsNewDbgInfoFormat == BB.getParent()->IsNewDbgInfoFormat,
-          "BB debug format should match parent function", &BB,
-          BB.IsNewDbgInfoFormat, BB.getParent(),
-          BB.getParent()->IsNewDbgInfoFormat);
-
   // Confirm that no issues arise from the debug program.
   if (BB.IsNewDbgInfoFormat)
     CheckDI(!BB.getTrailingDPValues(), "Basic Block has trailing DbgRecords!",