Merge pull request #71796 from xedin/make-dist-new-requirements-conditionally-available

[Distributed] Make new protocol requirements conditionally available

lib/SIL/IR/SILModule.cpp

@@ -152,6 +152,7 @@ SILModule::~SILModule() {
   for (SILFunction &F : *this) {
     F.dropAllReferences();
     F.dropDynamicallyReplacedFunction();
+    F.dropReferencedAdHocRequirementWitnessFunction();
     F.clearSpecializeAttrs();
   }
 
@@ -430,6 +431,7 @@ void SILModule::eraseFunction(SILFunction *F) {
   // (References are not needed anymore.)
   F->clear();
   F->dropDynamicallyReplacedFunction();
+  F->dropReferencedAdHocRequirementWitnessFunction();
   // Drop references for any _specialize(target:) functions.
   F->clearSpecializeAttrs();
 }