removed rn 0.59 setup instructions

Author: emin93

README.md

@@ -28,13 +28,7 @@
 ### React Native >= 0.60
 
 ```sh
-npx react-native init MyApp --template react-native-template-typescript@next
-```
-
-### React Native <= 0.59
-
-```sh
-react-native init MyApp --template typescript
+npx react-native init MyApp --template react-native-template-typescript
 ```
 
 ## :computer: Contributing