feat: 认证key兼容处理

internal/channel/gemini_channel.go

@@ -40,7 +40,6 @@ func (ch *GeminiChannel) ModifyRequest(req *http.Request, apiKey *models.APIKey,
 	req.URL.RawQuery = q.Encode()
 }
 
-
 // IsStreamRequest checks if the request is for a streaming response.
 func (ch *GeminiChannel) IsStreamRequest(c *gin.Context, bodyBytes []byte) bool {
 	path := c.Request.URL.Path
@@ -59,21 +58,6 @@ func (ch *GeminiChannel) IsStreamRequest(c *gin.Context, bodyBytes []byte) bool
 	return false
 }
 
-// ExtractKey extracts the API key from the X-Goog-Api-Key header or the "key" query parameter.
-func (ch *GeminiChannel) ExtractKey(c *gin.Context) string {
-	// 1. Check X-Goog-Api-Key header
-	if key := c.GetHeader("X-Goog-Api-Key"); key != "" {
-		return key
-	}
-
-	// 2. Check "key" query parameter
-	if key := c.Query("key"); key != "" {
-		return key
-	}
-
-	return ""
-}
-
 // ValidateKey checks if the given API key is valid by making a generateContent request.
 func (ch *GeminiChannel) ValidateKey(ctx context.Context, key string) (bool, error) {
 	upstreamURL := ch.getUpstreamURL()