Fixing linter and test errors

tests/cases/unittests/tsconfigParsing.ts

@@ -50,27 +50,6 @@ namespace ts {
             const host: ParseConfigHost = new MockParseConfigHost(basePath, true, allFileList);
             const parsed = ts.parseJsonConfigFileContent(json, host, basePath, /*existingOptions*/ undefined, configFileName);
             assert.isTrue(arrayIsEqualTo(parsed.fileNames.sort(), expectedFileList.sort()));
-
-            function mockReadDirectory(rootDir: string, extension: string, exclude: string[]): string[] {
-                const result: string[] = [];
-                const fullExcludeDirectories = ts.map(exclude, directory => combinePaths(rootDir, directory));
-                for (const file of allFileList) {
-                    let shouldExclude = false;
-                    for (const fullExcludeDirectorie of fullExcludeDirectories) {
-                        if (file.indexOf(fullExcludeDirectorie) >= 0) {
-                            shouldExclude = true;
-                            break;
-                        }
-                    }
-                    if (shouldExclude) {
-                        continue;
-                    }
-                    if (fileExtensionIs(file, extension)) {
-                        result.push(file);
-                    }
-                }
-                return result;
-            }
         }
 
         it("returns empty config for file with only whitespaces", () => {