message: uncomment check for Block implementing LAYOUT props
diff: @@ -2,7 +2,7 @@ import React from 'react'
  import Block from '../Block'
  import theme from '../theme'
  import {render} from '../utils/testing'
  -import {COMMON} from '../system-props'
  +import {COMMON, LAYOUT} from '../system-props'
  describe('Block', () => {
  it('is a system component', () => {
  @@ -11,8 +11,7 @@ describe('Block', () => {
  it('implements layout system props', () => {
  expect(Block).toImplementSystemProps(COMMON)
  - // FIXME
  - // expect(Block).toImplementSystemProps(LAYOUT)
  + expect(Block).toImplementSystemProps(LAYOUT)
  })
  it('renders without any props', () => {
  