Problem about delete method included a body

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Description

Delete method in gin can accept and process the body at lest when context-type is form-data or application/json. this situation conflict the #795

How to reproduce

package main

import (
	"github.com/gin-gonic/gin"
)

func main() {
	g := gin.Default()
	g.Delete("/test", func(c *gin.Context) {
                fmt.Println(c.GetPostForm("id"))
	})
	g.Run(":9000")
}

Expectations

Using postman request the 127.0.0.1:9000/test via by delete method, and set body with form-data or json type. it's will print id value.

Actual result

Actually, according to #795, delete method can't include body.

Environment

• go version: 1.18.3
• gin version (or commit ref): 1.7.7
• operating system: windows 10