[AST] Use llvm::none_of (NFC) (llvm#141447)

Author: kazutakahirata

clang/unittests/AST/ASTImporterFixtures.cpp

@@ -173,9 +173,8 @@ std::tuple<Decl *, Decl *> ASTImporterTestBase::getImportedDecl(
 TranslationUnitDecl *ASTImporterTestBase::getTuDecl(StringRef SrcCode,
                                                     TestLanguage Lang,
                                                     StringRef FileName) {
-  assert(llvm::find_if(FromTUs, [FileName](const TU &E) {
-           return E.FileName == FileName;
-         }) == FromTUs.end());
+  assert(llvm::none_of(
+      FromTUs, [FileName](const TU &E) { return E.FileName == FileName; }));
 
   std::vector<std::string> Args = getCommandLineArgsForLanguage(Lang);
   FromTUs.emplace_back(SrcCode, FileName, Args, Creator, ODRHandling);