This is an extremely bad habit, people over use it to make testing easier by mocking all over the place. They end up writing tests that are coupled to the implementation, and any small change breaks them.
Please go through the trouble to create the state of your object that you want to test, don't just mock other dependencies, which dependencies your method uses or how it does it's job is no concern of the test at all.
I agree, mocks should not be used and if you remove mock dependencies it usually exposes glaring problems in the code organization and design because the tests become overly complex. The dependencies should be coded to an interface so that you can inject whatever implementation you want.
