Remove reference to removed extra

README.md

@@ -63,7 +63,7 @@ infidelity = ff.infidelity(hadamard, spectrum, omega)
 ## Installation
 To install the package from PyPI, run `pip install filter_functions`. If you require the optional features provided by QuTiP (visualizing Bloch sphere trajectories), it is recommended to install QuTiP before by following the [instructions on their website](http://qutip.org/docs/latest/installation.html) rather than installing it through `pip`. To install the package from source run `python setup.py develop` to install using symlinks or `python setup.py install` without.
 
-To install dependencies of optional extras (`ipynbname` for a fancy progress bar in Jupyter notebooks, `matplotlib` for plotting, `QuTiP` for Bloch sphere visualization), run `pip install -e .[extra]` where `extra` is one or more of `fancy_progressbar`, `plotting`, `bloch_sphere_visualization` from the root directory. To install all dependencies, including those needed to build the documentation and run the tests, use the extra `all`.
+To install dependencies of optional extras (`matplotlib` for plotting, `QuTiP` for Bloch sphere visualization), run `pip install -e .[extra]` where `extra` is one or more of `plotting`, `bloch_sphere_visualization` from the root directory. To install all dependencies, including those needed to build the documentation and run the tests, use the extra `all`.
 
 ## Documentation
 You can find the documentation on [Readthedocs](https://filter-functions.readthedocs.io/en/latest/). It is built from Jupyter notebooks that can also be run interactively and are located [here](doc/source/examples). The notebooks explain how to use the package and thus make sense to follow chronologically as a first step. Furthermore, there are also a few example scripts in the [examples](examples) folder.