refactor(game): 删除未使用的 GetGameCompanyBySign 方法

-从 game/client.go 文件中移除了 GetGameCompanyBySign 函数- 此方法未在任何地方调用，删除以简化代码结构

services/game/client.go

@@ -88,9 +88,3 @@ func (c *Client) GetGameVersion(req *GetGameVersionReq) (resp *GetGameVersionRes
 	err = c.DoAction(req, resp)
 	return
 }
-
-func (c *Client) GetGameCompanyBySign(req *GetGameCompanyBySignReq) (resp *GetGameCompanyBySignResp, err error) {
-	resp = CreateGetGameCompanyBySignResp()
-	err = c.DoAction(req, resp)
-	return
-}