remove other platform supports, ONLY use chatGPT API

api/core/types/config.go

@@ -155,45 +155,6 @@ func (c RedisConfig) Url() string {
 	return fmt.Sprintf("%s:%d", c.Host, c.Port)
 }
 
-type Platform struct {
-	Name    string `json:"name"`
-	Value   string `json:"value"`
-	ChatURL string `json:"chat_url"`
-	ImgURL  string `json:"img_url"`
-}
-
-var OpenAI = Platform{
-	Name:    "OpenAI - GPT",
-	Value:   "OpenAI",
-	ChatURL: "https://api.chat-plus.net/v1/chat/completions",
-	ImgURL:  "https://api.chat-plus.net/v1/images/generations",
-}
-var Azure = Platform{
-	Name:    "微软 - Azure",
-	Value:   "Azure",
-	ChatURL: "https://chat-bot-api.openai.azure.com/openai/deployments/{model}/chat/completions?api-version=2023-05-15",
-}
-var ChatGLM = Platform{
-	Name:    "智谱 - ChatGLM",
-	Value:   "ChatGLM",
-	ChatURL: "https://open.bigmodel.cn/api/paas/v3/model-api/{model}/sse-invoke",
-}
-var Baidu = Platform{
-	Name:    "百度 - 文心大模型",
-	Value:   "Baidu",
-	ChatURL: "https://aip.baidubce.com/rpc/2.0/ai_custom/v1/wenxinworkshop/chat/{model}",
-}
-var XunFei = Platform{
-	Name:    "讯飞 - 星火大模型",
-	Value:   "XunFei",
-	ChatURL: "wss://spark-api.xf-yun.com/{version}/chat",
-}
-var QWen = Platform{
-	Name:    "阿里 - 通义千问",
-	Value:   "QWen",
-	ChatURL: "https://dashscope.aliyuncs.com/api/v1/services/aigc/text-generation/generation",
-}
-
 type SystemConfig struct {
 	Title         string `json:"title,omitempty"`       // 网站标题
 	Slogan        string `json:"slogan,omitempty"`      // 网站 slogan