Remove scenes (#36)

* Remove scenes from the main menu

* Remove scenes from the profile view

* Remove 'scenes explainer' from onboarding flow

* Remove scene-related modals

* Remove member/membership code

* Remove all scenes-related items from notifications

* Remove scene-related code from posts feed

* Remove scene-related API helpers

* Update tests

src/view/lib/assets.native.ts

@@ -1,5 +1,4 @@
 import {ImageSourcePropType} from 'react-native'
 
 export const DEF_AVATAR: ImageSourcePropType = require('../../../public/img/default-avatar.jpg')
-export const SCENE_EXPLAINER: ImageSourcePropType = require('../../../public/img/scene-explainer.jpg')
 export const TABS_EXPLAINER: ImageSourcePropType = require('../../../public/img/tabs-explainer.jpg')

src/view/lib/assets.ts

@@ -1,9 +1,6 @@
 import {ImageSourcePropType} from 'react-native'
 
 export const DEF_AVATAR: ImageSourcePropType = {uri: '/img/default-avatar.jpg'}
-export const SCENE_EXPLAINER: ImageSourcePropType = {
-  uri: '/img/scene-explainer.jpg',
-}
 export const TABS_EXPLAINER: ImageSourcePropType = {
   uri: '/img/tabs-explainer.jpg',
 }