removeFilter(type) {
    return this.execute(commands.REMOVE_FILTER, type);
  }
Remove filter on canvas image
@param {string} type - Filter type
@returns {Promise<FilterResult, ErrorMsg>}
@example
imageEditor.removeFilter('Grayscale').then(obj => {
    console.log('filterType: ', obj.type);
    console.log('actType: ', obj.action);
}).catch(message => {
    console.log('error: ', message);
});