fix: drop Cirrus CI (going away June 1, 2026) (#2817)

* fix: drop Cirrus CI (going away June 1, 2026)

Signed-off-by: Henry Schreiner <henryfs@princeton.edu>

* Restore missing note

* Update CI services documentation for Cirrus CI

Removed official support for Cirrus CI due to end-of-life.

---------

Signed-off-by: Henry Schreiner <henryfs@princeton.edu>

docs/data/projects.schema.json

@@ -20,7 +20,6 @@
             "travisci",
             "circleci",
             "gitlab",
-            "cirrusci",
             "azurepipelines"
           ]
         }

docs/data/projects.yml

@@ -4,7 +4,7 @@
 # stars: GitHub repo (optional, if different from package, such as for Twisted)
 # pypi: The pypi name, if different from the GitHub package name
 # os: Operating system list, [windows, apple, linux, android, ios, pyodide] (optional)
-# ci: [github, azurepipelines, circleci, gitlab, travisci, cirrusci] (optional)
+# ci: [github, azurepipelines, circleci, gitlab, travisci] (optional)
 # notes: (text, optional)
 
 - name: abess
@@ -401,7 +401,7 @@
 - name: pillow-heif
   gh: bigcat88/pillow_heif
   pypi: pillow-heif
-  ci: [github, cirrusci]
+  ci: [github]
   os: [apple, linux, windows]
   notes: Bindings to libheif library with third party dependencies. Fully automated CI for tests and publishing including Apple Silicon builds.
 

docs/data/readme_icons/cirrusci.svg

@@ -1 +0,0 @@
-<svg xmlns="http://www.w3.org/2000/svg" role="img" viewBox="0 0 24 24" width="16px" fill="#606060"><title>Cirrus CI icon</title><path d="M19.422.453a1.113 1.113 0 0 0-1.113 1.115 1.113 1.113 0 0 0 1.112 1.114c1.31 0 2.35 1.042 2.35 2.363 0 1.32-1.04 2.363-2.35 2.363H1.112A1.113 1.113 0 0 0 0 8.52a1.113 1.113 0 0 0 1.113 1.117h18.31c1.308 0 2.35 1.042 2.35 2.363 0 1.32-1.042 2.363-2.35 2.363H1.112A1.113 1.113 0 0 0 0 15.48a1.113 1.113 0 0 0 1.113 1.112h18.31c1.308 0 2.35 1.042 2.35 2.363 0 1.32-1.042 2.363-2.35 2.363H1.112A1.113 1.113 0 0 0 0 22.432a1.113 1.113 0 0 0 1.113 1.115h18.31a1.113 1.113 0 0 0 .206-.022c2.42-.112 4.37-2.12 4.37-4.57 0-1.393-.642-2.634-1.63-3.478C23.356 14.632 24 13.393 24 12c0-1.393-.643-2.632-1.63-3.477C23.357 7.68 24 6.438 24 5.045c0-2.52-2.06-4.592-4.578-4.592z"/></svg>