[typescript-fetch] Removed functions that are unused when withoutRuntime is true. (#12101)

* [typescript-fetch] remove unused function when withoutRuntimeCheks option to true

* [typescript-fetch] update samples

Author: mkusaka

modules/openapi-generator/src/main/resources/typescript-fetch/runtime.mustache

@@ -217,10 +217,12 @@ export interface RequestOpts {
     body?: HTTPBody;
 }
 
+{{^withoutRuntimeChecks}}
 export function exists(json: any, key: string) {
     const value = json[key];
     return value !== null && value !== undefined;
 }
+{{/withoutRuntimeChecks}}
 
 export function querystring(params: HTTPQuery, prefix: string = ''): string {
     return Object.keys(params)
@@ -244,12 +246,14 @@ export function querystring(params: HTTPQuery, prefix: string = ''): string {
         .join('&');
 }
 
+{{^withoutRuntimeChecks}}
 export function mapValues(data: any, fn: (item: any) => any) {
   return Object.keys(data).reduce(
     (acc, key) => ({ ...acc, [key]: fn(data[key]) }),
     {}
   );
 }
+{{/withoutRuntimeChecks}}
 
 export function canConsumeForm(consumes: Consume[]): boolean {
     for (const consume of consumes) {

samples/client/petstore/typescript-fetch/builds/without-runtime-checks/src/runtime.ts

@@ -228,10 +228,6 @@ export interface RequestOpts {
     body?: HTTPBody;
 }
 
-export function exists(json: any, key: string) {
-    const value = json[key];
-    return value !== null && value !== undefined;
-}
 
 export function querystring(params: HTTPQuery, prefix: string = ''): string {
     return Object.keys(params)
@@ -255,12 +251,6 @@ export function querystring(params: HTTPQuery, prefix: string = ''): string {
         .join('&');
 }
 
-export function mapValues(data: any, fn: (item: any) => any) {
-  return Object.keys(data).reduce(
-    (acc, key) => ({ ...acc, [key]: fn(data[key]) }),
-    {}
-  );
-}
 
 export function canConsumeForm(consumes: Consume[]): boolean {
     for (const consume of consumes) {