[Inliner] Make ModuleInlinerWrapperPass return PreservedAnalyses::all()

[aeubanks]

Summary

The ModulePassManager should already have taken care of all analysis
invalidation. Without this change, upcoming changes will cause more
invalidation than necessary.

llvm/lib/Transforms/IPO/Inliner.cpp

PreservedAnalyses ModuleInlinerWrapperPass::run(Module &M,
   // in postorder (or bottom-up).
   // If MaxDevirtIterations is 0, we just don't use the devirtualization
   // wrapper.
   if (MaxDevirtIterations == 0)
     MPM.addPass(createModuleToPostOrderCGSCCPassAdaptor(std::move(PM)));
   else
     MPM.addPass(createModuleToPostOrderCGSCCPassAdaptor(
         createDevirtSCCRepeatedPass(std::move(PM), MaxDevirtIterations)));
-  auto Ret = MPM.run(M, MAM);
+  MPM.run(M, MAM);
 
   IAA.clear();
-  return Ret;
+
+  // The ModulePassManager has already taken care of invalidating analyses.
+  return PreservedAnalyses::all();
 }