Removed deprecated CairoText class

[erik-rt]

Closes #1250

Changelog / Overview

• Removed CairoText class from manim.mobject.text_mobject
• Removed 'CairoText' from __all__
• Removed reference to CairoText in docstring

Motivation

CairoText is deprecated and should be removed from the library

Explanation for Changes

Testing Status

tests/test_graphical_units/test_opengl.py failed during testing, though the removal of CairoText should not have influenced this test

Further Comments

Checklist

• I have read the Contributing Guidelines
• I have written a descriptive PR title (see top of PR template for examples)
• I have written a changelog entry for the PR or deem it unnecessary
• My new functions/classes either have a docstring or are private
• My new functions/classes have tests added and (optional) examples in the docs
• My new documentation builds, looks correctly formatted, and adds no additional build warnings

Reviewer Checklist

• The PR title is descriptive enough
• The PR is labeled correctly
• The changelog entry is completed if necessary
• Newly added functions/classes either have a docstring or are private
• Newly added functions/classes have tests added and (optional) examples in the docs
• Newly added documentation builds, looks correctly formatted, and adds no additional build warnings

[jsonvillanueva]

LGTM! I don't think CairoText is mentioned anywhere else in docs either.

[naveen521kk]

sgtm, thanks.

[naveen521kk]

oh, no that check is failing for no reason. maybe do a dummy commit? (I think it should be fixed then.), I should fix it soon

[erik-rt]

oh, no that check is failing for no reason. maybe do a dummy commit? (I think it should be fixed then.), I should fix it soon

Hey Naveen, should I try making the dummy commit? You're thinking it'll fix itself then?

[naveen521kk]

Hey Naveen, should I try making the dummy commit? You're thinking it'll fix itself then?

yes, it should ideally fix itself. I will anyhow squash while merging so that doesn't matter.