remove unused code

src/harness/harnessLanguageService.ts

@@ -572,9 +572,6 @@ namespace Harness.LanguageService {
             this.writeMessage(message);
         }
 
-        writeCompressedData() {
-        }
-
         readFile(fileName: string): string {
             if (fileName.indexOf(Harness.Compiler.defaultLibFileName) >= 0) {
                 fileName = Harness.Compiler.defaultLibFileName;

src/harness/unittests/cachingInServerLSHost.ts

@@ -29,9 +29,6 @@ namespace ts {
             writeFile: (path: string, data: string, writeByteOrderMark?: boolean) => {
                 throw new Error("NYI");
             },
-            writeCompressedData() {
-                throw new Error("NYI");
-            },
             resolvePath: (path: string): string => {
                 throw new Error("NYI");
             },

src/harness/unittests/session.ts

@@ -23,8 +23,7 @@ namespace ts.server {
         setTimeout(callback, ms, ...args) { return 0; },
         clearTimeout(timeoutId) { },
         setImmediate: () => 0,
-        clearImmediate() {},
-        writeCompressedData() {}
+        clearImmediate() {}
     };
     const nullCancellationToken: HostCancellationToken = { isCancellationRequested: () => false };
     const mockLogger: Logger = {

src/server/types.d.ts

@@ -14,7 +14,6 @@ declare namespace ts.server {
         clearTimeout(timeoutId: any): void;
         setImmediate(callback: (...args: any[]) => void, ...args: any[]): any;
         clearImmediate(timeoutId: any): void;
-        writeCompressedData(prefix: string, data: CompressedData, suffix: string): void;
         gc?(): void;
         trace?(s: string): void;
     }

tests/webTestServer.ts

@@ -106,7 +106,7 @@ function writeFile(p: string, data: any, opts: { recursive: boolean }) {
 
 function mkdir(p: string) {
     const basePath = path.dirname(p);
-    let shouldCreateParent = p !== basePath && !fs.existsSync(basePath);
+    const shouldCreateParent = p !== basePath && !fs.existsSync(basePath);
     if (shouldCreateParent) {
         mkdir(basePath);
     }