Remove unused imports

src/components/modals/AddModal.jsx

@@ -2,8 +2,6 @@ import React from 'react'
 import PropTypes from 'prop-types'
 
 import Button from '../Button'
-import InputBlock from '../inputs/InputBlock'
-import StringInput from '../inputs/StringInput'
 import Modal from './Modal'
 
 import LayerTypeBlock from '../layers/LayerTypeBlock'

src/components/modals/ExportModal.jsx

@@ -21,11 +21,14 @@ class Gist extends React.Component {
     onStyleChanged: PropTypes.func.isRequired,
   }
 
-  state = {
-    preview: false,
-    public: false,
-    saving: false,
-    latestGist: null,
+  constructor(props) {
+    super(props);
+    this.state = {
+      preview: false,
+      public: false,
+      saving: false,
+      latestGist: null,
+    }
   }
 
   UNSAFE_componentWillReceiveProps(nextProps) {

src/components/modals/ShortcutsModal.jsx

@@ -1,7 +1,6 @@
 import React from 'react'
 import PropTypes from 'prop-types'
 
-import Button from '../Button'
 import Modal from './Modal'