Delete 'src/screens/AboutScreen.js.old'

removing per notes in issue #3

src/screens/AboutScreen.js.old

@@ -1,28 +0,0 @@
-import React from 'react';
-import {
-    View,
-    Text,
-  } from 'react-native';
-
-class AboutScreen extends React.Component {
-    static navigationOptions = ({ navigation }) => {
-      return {
-        title: navigation.getParam('otherParam', 'About'),
-        headerStyle: {
-          backgroundColor: '#3333ff',
-        },
-        headerTintColor: '#fff',
-      };
-    };
-  
-    render() {
-      return (
-        <View style={{ flex: 1, alignItems: 'center', justifyContent: 'center' }}>
-    <Text>About Screen{"\n"}{"\n"}
-    RPI Media Center Control v 1.0 beta</Text>
-        </View>
-      );
-    }
-  }
-
-  export default AboutScreen;