Remove unused installation and pin pyvista version (#217)

* Remove unused installation and pin pyvista version

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Update a_lesson_filters.py

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

requirements_docs.txt

@@ -16,11 +16,9 @@ numpydoc==1.5.0
 osmnx==1.2.2
 pydata-sphinx-theme==0.11.0
 pypandoc==1.10
-pyqt5
 pytest-sphinx==0.5.0
+pyvista==0.42.3
 pyvista-xarray==0.1.3
-pyvistaqt
-QtPy
 scipy==1.10.0
 Sphinx==5.3.0
 sphinx-autobuild==2021.3.14

tutorial/04_filters/a_lesson_filters.py

@@ -14,7 +14,7 @@
 ###############################################################################
 # PyVista wrapped data objects have a suite of common filters ready for immediate
 # use directly on the object. These filters include the following
-# (see :ref:`filters_ref` for a complete list):
+# (see `filters_ref`_ for a complete list):
 #
 # * `slice()`_ creates a single slice through the input dataset on a user defined plane
 # * `slice_orthogonal()`_: creates a :class:`pyvista.MultiBlock` dataset of three orthogonal slices
@@ -33,6 +33,7 @@
 # .. _clip(): https://docs.pyvista.org/version/stable/api/core/_autosummary/pyvista.DataSetFilters.clip.html
 # .. _outline_corners(): https://docs.pyvista.org/version/stable/api/core/_autosummary/pyvista.DataSetFilters.outline_corners.html
 # .. _extract_geometry(): https://docs.pyvista.org/version/stable/api/core/_autosummary/pyvista.DataSetFilters.extract_geometry.html
+# .. _filters_ref: https://docs.pyvista.org/version/stable/api/core/filters
 #
 # To use these filters, call the method of your choice directly on your data
 # object: