[clang] Remove redundant return [NFC]

lib/CodeGen/CGOpenMPRuntimeNVPTX.cpp

public:
     }
     void Exit(CodeGenFunction &CGF) override {
       RT.emitSpmdEntryFooter(CGF, EST);
     }
   } Action(*this, EST, D);
   CodeGen.setAction(Action);
   emitTargetOutlinedFunctionHelper(D, ParentName, OutlinedFn, OutlinedFnID,
                                    IsOffloadEntry, CodeGen);
-  return;
 }
 
 void CGOpenMPRuntimeNVPTX::emitSpmdEntryHeader(
     CodeGenFunction &CGF, EntryFunctionState &EST,
     const OMPExecutableDirective &D) {
   auto &Bld = CGF.Builder;
 
   // Setup BBs in entry function.

lib/Driver/Driver.cpp

if (Arg *OpenMPTargets =
     } else
       Diag(clang::diag::warn_drv_empty_joined_argument)
           << OpenMPTargets->getAsString(C.getInputArgs());
   }
 
   //
   // TODO: Add support for other offloading programming models here.
   //
-
-  return;
 }
 
 Compilation *Driver::BuildCompilation(ArrayRef<const char *> ArgList) {
   llvm::PrettyStackTraceString CrashInfo("Compilation construction");
 
   // FIXME: Handle environment options which affect driver behavior, somewhere
   // (client?). GCC_EXEC_PREFIX, LPATH, CC_PRINT_OPTIONS.
 

lib/StaticAnalyzer/Checkers/ObjCSuperDeallocChecker.cpp

void ObjCSuperDeallocChecker::checkPreObjCMessage(const ObjCMethodCall &M,
 
   if (isSuperDeallocMessage(M)) {
     Desc = "[super dealloc] should not be called multiple times";
   } else {
     Desc = StringRef();
   }
 
   reportUseAfterDealloc(ReceiverSymbol, Desc, M.getOriginExpr(), C);
-
-  return;
 }
 
 void ObjCSuperDeallocChecker::checkPreCall(const CallEvent &Call,
                                            CheckerContext &C) const {
   diagnoseCallArguments(Call, C);
 }
 
 void ObjCSuperDeallocChecker::checkPostObjCMessage(const ObjCMethodCall &M,