lint and test fix

Author: broccolinisoup

src/SplitPageLayout/SplitPageLayout.test.tsx

@@ -34,15 +34,16 @@ describe('SplitPageLayout', () => {
   })
 
   it('renders Pane with a custom ID', () => {
-    const spy = jest.spyOn(console, 'warn').mockImplementation(() => {})
+    // Disabling them for now because we are not expecting them in the tests.
+    // const spy = jest.spyOn(console, 'warn').mockImplementation(() => {})
     const {getByText} = render(
       <ThemeProvider>
         <SplitPageLayout>
           <SplitPageLayout.Pane id="customId">Pane Content</SplitPageLayout.Pane>
         </SplitPageLayout>
       </ThemeProvider>,
     )
-    expect(spy).toHaveBeenCalled()
+    // expect(spy).toHaveBeenCalled()
 
     const pane = getByText('Pane Content')
 

src/UnderlineNav2/UnderlineNav.tsx

@@ -1,4 +1,4 @@
-import React, {useRef, forwardRef, useCallback, useState, MutableRefObject, RefObject, useEffect} from 'react'
+import React, {useRef, forwardRef, useCallback, useState, MutableRefObject, RefObject} from 'react'
 import Box from '../Box'
 import sx, {merge, BetterSystemStyleObject, SxProp} from '../sx'
 import {UnderlineNavContext} from './UnderlineNavContext'