Remove experimental types (#47405)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/47405

Changelog: [Internal] - With New Architecture out, delete experimental type definition and move types back to relevant definition files

Reviewed By: cortinico, jorge-cab

Differential Revision: D65462903

fbshipit-source-id: bd7fc5bb689eb054b3a30ec7b388e0f455ff1c93