Deprecations: list of all past and ongoing deprecations

[humitos]

We have been deprecating pretty old non-used or broken features in the last weeks and we found ourselves a little lost about the big picture (whole plan) but also about what are the features that are going through the deprecation time. This issue just list them all here with the exact dates when they are making effective:

Feature	Email (dates)	Removal (dates)	Affected projects
~https://github.com/readthedocs/readthedocs.org/pull/10514: Drop PyPy support~	Not sent	July 18th	0
~https://github.com/readthedocs/readthedocs.org/pull/10550: Fail builds without index.html~	July 19th	August 1st	~114
~https://github.com/readthedocs/readthedocs.org/pull/10508: Install latest version of requirements~	July 10th	August 7th	New projects
~https://github.com/readthedocs/readthedocs.org/pull/10494: Remove UPDATE_CONDA_STARTUP~	Jun 29th	August 28th	13
~https://github.com/readthedocs/readthedocs.org/pull/10588: Remove DONT_SHALLOW_CLONE~	June 26th	August 28th	61
~https://github.com/readthedocs/readthedocs.org/pull/5609: Doctools without config file~	July 11th	August 28th	1.8k
~https://github.com/readthedocs/readthedocs.org/pull/10562: Remove python.system_packages~	August 7th	August 29th	~8k
~https://github.com/readthedocs/readthedocs.org/pull/10367: No .readthedocs.yaml and v1~	Weekly (starting May 31th)	September 25th	All projects
~https://github.com/readthedocs/readthedocs.org/pull/10584: Drop support for MkDocs 0.17.3~	August 2nd	October 3rd	293
~https://github.com/readthedocs/readthedocs.org/pull/10365: Drop support for Sphinx 1.x~	Aug 23th	October 3rd	~8k
~https://github.com/readthedocs/readthedocs.org/pull/10589: Drop build.image~	Weekly	October 16th	~16k
~https://github.com/readthedocs/readthedocs.org/pull/8840: Drop VCS (svn, hg, bzr)~	March 20th	June 3rd	~6k
~https://github.com/readthedocs/readthedocs.org/pull/11206: Drop MKDOCS_THEME_RTD feature flag~	Undefined	April 15th	~2
~https://github.com/readthedocs/readthedocs.org/pull/9993: Don't serve README.html at /~	May 28th	July 1st	~250
https://github.com/readthedocs/readthedocs.org/pull/11441: Don't auto-inject Sphinx context/configs	Soon	July 29th & Oct 7th	All Sphinx projects
https://github.com/readthedocs/readthedocs.org/pull/9530: Auto-injection of Google Analytics	Undefined	Oct 7th	~5k
https://github.com/readthedocs/readthedocs.org/issues/8659: Deprecate setup.py install	Undefined	Undefined	~350
https://github.com/readthedocs/readthedocs.org/issues/10677: Embed APIv2 removal	Undefined	Undefined	~30
https://github.com/readthedocs/readthedocs.org/issues/10637: Stop finding conf.py and mkdocs.yml	Undefined	Undefined	~950
https://github.com/readthedocs/readthedocs.org/issues/11037: Old incoming webhooks	Undefined	Undefined	N/A

Related: https://github.com/readthedocs/readthedocs.org/issues/9779

Note: the table is sort by ascending "Removal (dates)"

[ericholscher]

This looks good. I might align the Sphinx 1.8 & Mkdocs .17 dates, since they seem like basically the same deprecation (eg. removing old default build tools).

[stsewd]

We are deprecating webhooks created without a secret on January 31st, 2024.

https://blog.readthedocs.com/security-update-on-incoming-webhooks/