[ORC] Drop unused LinkGraphLinkingLayer::Plugin::notifyLoaded method. (#145457)

This method was included in the original Plugin API as a counterpart to
JITEventListener::notifyLoaded but was never used.

Author: lhames

llvm/examples/OrcV2Examples/LLJITWithObjectLinkingLayerPlugin/LLJITWithObjectLinkingLayerPlugin.cpp

@@ -70,10 +70,6 @@ class MyPlugin : public ObjectLinkingLayer::Plugin {
     Config.PostPrunePasses.push_back(printGraph);
   }
 
-  void notifyLoaded(MaterializationResponsibility &MR) override {
-    outs() << "Loading object defining " << MR.getSymbols() << "\n";
-  }
-
   Error notifyEmitted(MaterializationResponsibility &MR) override {
     outs() << "Emitted object defining " << MR.getSymbols() << "\n";
     return Error::success();

llvm/include/llvm/ExecutionEngine/Orc/LinkGraphLinkingLayer.h

@@ -63,7 +63,6 @@ class LLVM_ABI LinkGraphLinkingLayer : public LinkGraphLayer,
                                      jitlink::JITLinkContext &Ctx,
                                      MemoryBufferRef InputObject) {}
 
-    virtual void notifyLoaded(MaterializationResponsibility &MR) {}
     virtual Error notifyEmitted(MaterializationResponsibility &MR) {
       return Error::success();
     }

llvm/lib/ExecutionEngine/Orc/LinkGraphLinkingLayer.cpp

@@ -207,7 +207,6 @@ class LinkGraphLinkingLayer::JITLinkCtx final : public JITLinkContext {
     if (auto Err = MR->notifyResolved(InternedResult))
       return Err;
 
-    notifyLoaded();
     return Error::success();
   }
 
@@ -244,11 +243,6 @@ class LinkGraphLinkingLayer::JITLinkCtx final : public JITLinkContext {
     return Error::success();
   }
 
-  void notifyLoaded() {
-    for (auto &P : Plugins)
-      P->notifyLoaded(*MR);
-  }
-
   Error notifyEmitted(jitlink::JITLinkMemoryManager::FinalizedAlloc FA) {
     Error Err = Error::success();
     for (auto &P : Plugins)