fix(): revert onComponentUpdate and remove useless async/await

rust/signer/Cargo.lock

+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
 [[package]]
 name = "adler32"
 version = "1.0.3"

src/screens/AccountBackup.js

@@ -39,17 +39,12 @@ export default class AccountBackup extends React.PureComponent {
   }
 }
 
-class AccountBackupView extends React.Component {
+class AccountBackupView extends React.PureComponent {
   constructor(...args) {
     super(...args);
     this.handleAppStateChange = this.handleAppStateChange.bind(this);
   }
 
-  shouldComponentUpdate (nextProps) {
-    const hasEmptySeed = nextProps.accounts.state.newAccount.seed === "";
-    return !hasEmptySeed;
-  }
-
   componentDidMount () {
     AppState.addEventListener('change', this.handleAppStateChange);
   }
@@ -60,13 +55,13 @@ class AccountBackupView extends React.Component {
     }
   }
 
-  async componentWillUnmount () {
+  componentWillUnmount () {
     const { accounts } = this.props;
     const selected =
       accounts.getNew().address && accounts.getNew().address.length
         ? accounts.getNew()
         : accounts.getSelected();
-    await accounts.lockAccount(selected);
+    accounts.lockAccount(selected);
     AppState.removeEventListener('change', this._handleAppStateChange);
   }
 

src/screens/AccountNew.js

@@ -45,12 +45,6 @@ export default class AccountNew extends React.Component {
 }
 
 class AccountNewView extends React.Component {
-
-  shouldComponentUpdate (nextProps) {
-    const hasEmptySeed = nextProps.accounts.state.newAccount.seed === "";
-    return !hasEmptySeed;
-  }
-
   render () {
     const { accounts } = this.props;
     const selected = accounts.getNew();