fix autocomplete sets previous value using onInputChange

[tdnl]

Problem

When providing onInputChange to an AutocompleteInput, a useEffect is run and resets the Textbox's value to the previous value.

As a result, users can not manually type a value when onInputChange provided.

Solution

It turns out the useEffect is not necessary if React-Admin's custom onInputChange properly sets the Textbox's state whenever it is called.

[djhi]

@tdni any news on this one?