chore(platforms/web/server/util): Removes duplicate values from the attr list (vuejs#11064)

Author: ahaoboy

src/platforms/web/server/util.js

@@ -5,17 +5,17 @@ import { makeMap } from 'shared/util'
 const isAttr = makeMap(
   'accept,accept-charset,accesskey,action,align,alt,async,autocomplete,' +
   'autofocus,autoplay,autosave,bgcolor,border,buffered,challenge,charset,' +
-  'checked,cite,class,code,codebase,color,cols,colspan,content,http-equiv,' +
-  'name,contenteditable,contextmenu,controls,coords,data,datetime,default,' +
-  'defer,dir,dirname,disabled,download,draggable,dropzone,enctype,method,for,' +
+  'checked,cite,class,code,codebase,color,cols,colspan,content,' +
+  'contenteditable,contextmenu,controls,coords,data,datetime,default,' +
+  'defer,dir,dirname,disabled,download,draggable,dropzone,enctype,for,' +
   'form,formaction,headers,height,hidden,high,href,hreflang,http-equiv,' +
   'icon,id,ismap,itemprop,keytype,kind,label,lang,language,list,loop,low,' +
   'manifest,max,maxlength,media,method,GET,POST,min,multiple,email,file,' +
   'muted,name,novalidate,open,optimum,pattern,ping,placeholder,poster,' +
   'preload,radiogroup,readonly,rel,required,reversed,rows,rowspan,sandbox,' +
   'scope,scoped,seamless,selected,shape,size,type,text,password,sizes,span,' +
   'spellcheck,src,srcdoc,srclang,srcset,start,step,style,summary,tabindex,' +
-  'target,title,type,usemap,value,width,wrap'
+  'target,title,usemap,value,width,wrap'
 )
 
 const unsafeAttrCharRE = /[>/="'\u0009\u000a\u000c\u0020]/ // eslint-disable-line no-control-regex