Не получается удалить кнопки из тулбара CKEDITOR

CKEDITOR.editorConfig = function( config ) {
    // Define changes to default configuration here.
    // For complete reference see:
    // https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_config.html
 
    // The toolbar groups arrangement, optimized for two toolbar rows.
    CKEDITOR.editorConfig = function (config) {
        config.toolbarGroups = [
            { name: 'clipboard', groups: ['clipboard', 'undo'] },
            { name: 'editing', groups: ['find', 'selection', 'spellchecker', 'editing'] },
            { name: 'links', groups: ['links'] },
            { name: 'insert', groups: ['insert'] },
            { name: 'forms', groups: ['forms'] },
            { name: 'tools', groups: ['tools'] },
            { name: 'document', groups: ['mode', 'document', 'doctools'] },
            { name: 'others', groups: ['others'] },
            '/',
            { name: 'basicstyles', groups: ['basicstyles', 'cleanup'] },
            { name: 'paragraph', groups: ['list', 'indent', 'blocks', 'align', 'bidi', 'paragraph'] },
            { name: 'styles', groups: ['styles'] },
            { name: 'colors', groups: ['colors'] }
        ];
 
config.removeButtons = 'Underline, Subscript, Superscript, Cut, Paste, PasteText,PasteFromWord,Find,Replace,SelectAll,Scayt,Form,Checkbox,Radio,TextField,Textarea,Select,Button,ImageButton,HiddenField,Subscript,Superscript,RemoveFormat,Outdent,Indent,Blockquote,CreateDiv,JustifyLeft,JustifyCenter,JustifyRight,JustifyBlock,BidiLtr,BidiRtl,Link,Unlink,Anchor,CreatePlaceholder,Image,Flash,Smiley,SpecialChar,PageBreak,Iframe,InsertPre,Styles,Format,Font,FontSize,TextColor,BGColor,UIColor,Maximize,ShowBlocks,button1,button2,button3,oembed,MediaEmbed,About,HorizontalRule,Source';
        
config.removePlugins = 'spellchecker, about, save, newpage, print, templates, scayt, flash, pagebreak, smiley,preview,find';    
    };
};

CKEDITOR.editorConfig = function (config) {
        config.toolbarGroups = [
            { name: 'clipboard', groups: ['clipboard', 'undo'] },
            { name: 'editing', groups: ['find', 'selection', 'spellchecker', 'editing'] },
            { name: 'links', groups: ['links'] },
            { name: 'insert', groups: ['insert'] },
            { name: 'forms', groups: ['forms'] },
            { name: 'tools', groups: ['tools'] },
            { name: 'document', groups: ['mode', 'document', 'doctools'] },
            { name: 'others', groups: ['others'] },
            '/',
            { name: 'basicstyles', groups: ['basicstyles', 'cleanup'] },
            { name: 'paragraph', groups: ['list', 'indent', 'blocks', 'align', 'bidi', 'paragraph'] },
            { name: 'styles', groups: ['styles'] },
            { name: 'colors', groups: ['colors'] }
        ];
 
config.removeButtons = 'Underline, Subscript, Superscript, Cut, Paste, PasteText,PasteFromWord,Find,Replace,SelectAll,Scayt,Form,Checkbox,Radio,TextField,Textarea,Select,Button,ImageButton,HiddenField,Subscript,Superscript,RemoveFormat,Outdent,Indent,Blockquote,CreateDiv,JustifyLeft,JustifyCenter,JustifyRight,JustifyBlock,BidiLtr,BidiRtl,Link,Unlink,Anchor,CreatePlaceholder,Image,Flash,Smiley,SpecialChar,PageBreak,Iframe,InsertPre,Styles,Format,Font,FontSize,TextColor,BGColor,UIColor,Maximize,ShowBlocks,button1,button2,button3,oembed,MediaEmbed,About,HorizontalRule,Source';
        
config.removePlugins = 'spellchecker, about, save, newpage, print, templates, scayt, flash, pagebreak, smiley,preview,find';    
    };