fix: remove unnecessary error handling in token counting functions

relay/channel/claude/relay-claude.go

@@ -619,9 +619,6 @@ func HandleClaudeResponseData(c *gin.Context, info *relaycommon.RelayInfo, claud
 	}
 	if requestMode == RequestModeCompletion {
 		completionTokens := service.CountTextToken(claudeResponse.Completion, info.OriginModelName)
-		if err != nil {
-			return service.OpenAIErrorWrapper(err, "count_token_text_failed", http.StatusInternalServerError)
-		}
 		claudeInfo.Usage.PromptTokens = info.PromptTokens
 		claudeInfo.Usage.CompletionTokens = completionTokens
 		claudeInfo.Usage.TotalTokens = info.PromptTokens + completionTokens