Remove unused regex and format errors and utils files

errors.go

@@ -2,7 +2,6 @@ package telebot
 
 import (
 	"fmt"
-	"regexp"
 	"strings"
 )
 
@@ -50,8 +49,6 @@ func NewAPIError(code int, msgs ...string) *APIError {
 	return err
 }
 
-var errorRx = regexp.MustCompile(`{.+"error_code":(\d+),"description":"(.+)"(?:,"parameters":{"retry_after":(\d+)})?}`)
-
 var (
 	// General errors
 	ErrUnauthorized      = NewAPIError(401, "Unauthorized")

util.go

@@ -61,10 +61,10 @@ func wrapError(err error) error {
 func extractOk(data []byte) error {
 	// Parse the error message as JSON
 	var tgramApiError struct {
-		Ok bool `json:"ok"`
+		Ok          bool                   `json:"ok"`
-		ErrorCode int `json:"error_code"`
+		ErrorCode   int                    `json:"error_code"`
-		Description string `json:"description"`
+		Description string                 `json:"description"`
-		Parameters map[string]interface{} `json:"parameters"`
+		Parameters  map[string]interface{} `json:"parameters"`
 	}
 	err := json.Unmarshal(data, &tgramApiError)
 	if err != nil {