Move /platform/detection vars into /env (#9707)

* Add platform vars to env

* Replace /platform/detection with /env

src/platform/detection.ts

@@ -1,12 +0,0 @@
-import {Platform} from 'react-native'
-
-export const isIOS = Platform.OS === 'ios'
-export const isAndroid = Platform.OS === 'android'
-export const isNative = isIOS || isAndroid
-export const isWeb = !isNative
-export const isMobileWebMediaQuery = 'only screen and (max-width: 1300px)'
-export const isMobileWeb =
-  isWeb &&
-  // @ts-ignore we know window exists -prf
-  global.window.matchMedia(isMobileWebMediaQuery)?.matches
-export const isIPhoneWeb = isWeb && /iPhone/.test(navigator.userAgent)

src/platform/urls.tsx

@@ -1,26 +0,0 @@
-import {Linking} from 'react-native'
-
-import {isNative, isWeb} from './detection'
-
-export async function getInitialURL(): Promise<string | undefined> {
-  if (isNative) {
-    const url = await Linking.getInitialURL()
-    if (url) {
-      return url
-    }
-    return undefined
-  } else {
-    // @ts-ignore window exists -prf
-    if (window.location.pathname !== '/') {
-      return window.location.pathname
-    }
-    return undefined
-  }
-}
-
-export function clearHash() {
-  if (isWeb) {
-    // @ts-ignore window exists -prf
-    window.location.hash = ''
-  }
-}