Update comments and address feedback

etc/firebase-admin.remote-config.api.md

@@ -178,7 +178,6 @@ export interface ServerTemplate {
     cache: ServerTemplateData;
     evaluate(context?: EvaluationContext): ServerConfig;
     load(): Promise<void>;
-    toJSON(): string;
 }
 
 // @public

src/remote-config/remote-config-api.ts

@@ -399,12 +399,6 @@ export interface ServerTemplate {
    * project's {@link ServerTemplate}.
    */
   load(): Promise<void>;
-
-  /** 
-   * Convenient method that returns the JSON string of the cached template data
-   * @returns A JSON-string of this object.
-   */
-  toJSON(): string;
 }
 
 /**

test/unit/remote-config/remote-config.spec.ts

@@ -649,7 +649,7 @@ describe('RemoteConfig', () => {
         }
       };
       const initializedTemplate = remoteConfig.initServerTemplate({ template });
-      const parsed = JSON.parse(initializedTemplate.toJSON());
+      const parsed = JSON.parse(JSON.stringify(initializedTemplate.cache));
       expect(parsed).deep.equals(deepCopy(template));
     });
 
@@ -666,7 +666,7 @@ describe('RemoteConfig', () => {
       };
       const templateJson = JSON.stringify(template);
       const initializedTemplate = remoteConfig.initServerTemplate({ template: templateJson });
-      const parsed = JSON.parse(initializedTemplate.toJSON());
+      const parsed = JSON.parse(JSON.stringify(initializedTemplate.cache));
       const expectedVersion = deepCopy(VERSION_INFO);
       expectedVersion.updateTime = new Date(expectedVersion.updateTime).toUTCString();
       template.version = expectedVersion as Version;