mark unused vars as errors

Reviewed By: lblasa

Differential Revision: D50500690

fbshipit-source-id: 6f739fe25c232ecfe842337af4399681e85f6a13

desktop/flipper-plugin/src/ui/Container.tsx

@@ -7,7 +7,7 @@
  * @format
  */
 
-import React, {CSSProperties, forwardRef} from 'react';
+import React from 'react';
 import styled from '@emotion/styled';
 import {
   normalizePadding,

desktop/flipper-plugin/src/ui/NUX.tsx

@@ -16,7 +16,6 @@ import React, {
 } from 'react';
 import {Badge, Tooltip, Typography, Button} from 'antd';
 import styled from '@emotion/styled';
-import {keyframes} from '@emotion/css';
 import reactElementToJSXString from 'react-element-to-jsx-string';
 import {SandyPluginContext} from '../plugin/PluginContext';
 import {createState} from 'flipper-plugin-core';

desktop/flipper-plugin/src/ui/renderSplitLayout.tsx

@@ -7,15 +7,9 @@
  * @format
  */
 
-import React, {CSSProperties, forwardRef} from 'react';
+import React, {CSSProperties} from 'react';
 import styled from '@emotion/styled';
-import {
-  normalizePadding,
-  normalizeSpace,
-  PaddingProps,
-  Spacing,
-  theme,
-} from './theme';
+import {normalizeSpace, Spacing, theme} from './theme';
 
 import type {SplitLayoutProps} from './Layout';
 import {Sidebar} from './Sidebar';