Revert "Merge pull request #4254 from astaxie/develop-2.0"

This reverts commit e284b0ddae, reversing
changes made to 8ef8fd2606.

adapter/utils/captcha/image.go

@@ -1,35 +0,0 @@
-// Copyright 2014 beego Author. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package captcha
-
-import (
-	"io"
-
-	"github.com/astaxie/beego/server/web/captcha"
-)
-
-// Image struct
-type Image captcha.Image
-
-// NewImage returns a new captcha image of the given width and height with the
-// given digits, where each digit must be in range 0-9.
-func NewImage(digits []byte, width, height int) *Image {
-	return (*Image)(captcha.NewImage(digits, width, height))
-}
-
-// WriteTo writes captcha image in PNG format into the given writer.
-func (m *Image) WriteTo(w io.Writer) (int64, error) {
-	return (*captcha.Image)(m).WriteTo(w)
-}