Monorepo [10/?] - remove reanimated2 directory

[tjzel]

About

This pull request is a part of the effort of migrating to monorepo structure:

• Monorepo  #5992
• Monorepo [0/?] - move move github actions to root #5993
• Monorepo [1/?] - move precommit scripts to root #5998
• Monorepo [2/?] - use hoisted dependencies for Reanimated, app common code and paper example #5999
• Monorepo [3/?] - redo WebExample #6008
• Monorepo [4/?] - clean and unify configs #6020
• Monorepo [5/?] - make workspace from FabricExample #6023
• Monorepo [7/?] - make workspace from MacOS Example #6029
• Monorepo [8/?] - docs #6051
• Monorepo [9/?] - TVOSExample #6053

Summary

This particular pull request takes removes reanimated2 directory from src.

Test plan

Example apps should work as expected.