Remove unused errors

Author: Fauzyy

client.go

@@ -3,7 +3,6 @@ package rest
 import (
 	"bytes"
 	"encoding/json"
-	"errors"
 	"fmt"
 	"io"
 	"net/http"
@@ -12,15 +11,6 @@ import (
 	log "github.com/sirupsen/logrus"
 )
 
-var (
-	// ErrServiceUnavailable represents a 422
-	ErrServiceUnavailable = errors.New("Service Not Found")
-	// ErrBadRequest represents a 400
-	ErrBadRequest = errors.New("Bad Request")
-	// ErrSWW represents all other http errors
-	ErrSWW = errors.New("Something Went Wrong")
-)
-
 // Client represents a rest http client and is used to send requests to OpsLevel integrations
 type Client struct {
 	baseURL    *url.URL