[clang] Remove redundant control flow statements (NFC) (#155138)

Author: kazutakahirata

clang/lib/CodeGen/Targets/RISCV.cpp

@@ -955,7 +955,6 @@ void RISCVABIInfo::createCoercedStore(llvm::Value *Val, Address Dst,
       cast<llvm::FixedVectorType>(EltTy), Val, uint64_t(0));
   auto *I = CGF.Builder.CreateStore(Coerced, Dst, DestIsVolatile);
   CGF.addInstToCurrentSourceAtom(I, Val);
-  return;
 }
 
 namespace {

clang/lib/Driver/Driver.cpp

@@ -4672,7 +4672,6 @@ void Driver::BuildDriverManagedModuleBuildActions(
     Compilation &C, llvm::opt::DerivedArgList &Args, const InputList &Inputs,
     ActionList &Actions) const {
   Diags.Report(diag::remark_performing_driver_managed_module_build);
-  return;
 }
 
 /// Returns the canonical name for the offloading architecture when using a HIP

clang/lib/Driver/ToolChains/HLSL.cpp

@@ -215,7 +215,6 @@ void getSpirvExtOperand(StringRef SpvExtensionArg, raw_ostream &out) {
     return;
   }
   out << SpvExtensionArg;
-  return;
 }
 
 SmallString<1024> getSpirvExtArg(ArrayRef<std::string> SpvExtensionArgs) {

clang/unittests/Analysis/FlowSensitive/FormulaTest.cpp

@@ -22,8 +22,6 @@ using namespace dataflow;
 using ::llvm::Failed;
 using ::llvm::HasValue;
 using ::llvm::Succeeded;
-using ::testing::ElementsAre;
-using ::testing::IsEmpty;
 
 class SerializeFormulaTest : public ::testing::Test {
 protected: