code clean up 2-2-TokenCache remove duplicate readme file

[damienbod]

Purpose

Removes a duplicate readme file

Does this introduce a breaking change?

[ ] Yes
[x] No

Pull Request Type

What kind of change does this Pull Request introduce?

[ ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[x] Documentation content changes
[ ] Other... Please describe:

[damienbod]

Hi @jmprieur Is this ok, the file is a duplicate

Greetings Damien

[jmprieur]

@damienbod : provided nothing was pointing to this one, it's ok.