Remove incorrect statement about resolution behavior

`shell` does not fall through to `local`, and `local to `global`.

README.md

@@ -400,7 +400,6 @@ pyenv global 3.11 3.12
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 Whenever you run a command provided by a Python installation, these versions will be searched for it in the specified order.
-Versions selected with `pyenv shell` are searched first, then `pyenv local`, then `pyenv global`.
 [Due to the shims' fall-through behavior]((#understanding-python-version-selection)), `system` is always implicitly searched afterwards.
 
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