Remove unnecessary comment in contextManager

- Remove comment "// 处理所有命令" from processText method.

src/context/contextManager.ts

@@ -64,7 +64,6 @@ export interface ChatContext {
     }
   
     async processText(command: string): Promise<string[]> {
-        // 处理所有命令
         for (const contextObj of this.contexts) {
             if (contextObj.name === command) {
                 return await contextObj.handler();