Remove unused handwritten ScrollViewViewConfig.js (#39655)

Summary:
`ScrollViewViewConfig.js` has been unused since [RN: Migrate ScrollView to NativeComponentRegistry](00e623d)

> Given to microsoft/react-native-windows#5430 (comment) `react-native/babel-plugin-codegen` has been part of `react-native/babel-preset`, it is safe to remove handwritten `ScrollViewViewConfig.js`

## Changelog:

[INTERNAL] [REMOVED] - Remove unused handwritten ScrollViewViewConfig.js

Pull Request resolved: #39655

Test Plan: None

Reviewed By: yungsters

Differential Revision: D49774632

Pulled By: dmytrorykun

fbshipit-source-id: a436d98f14d1e83f057a2ea4e96a527e759b80f1