[TASK] remove build:docs

While it certainly was convenient, it was also just a hack.

Docs are built in a Github workflow.

Please refer to
https://docs.typo3.org/m/typo3/docs-how-to-document/main/en-us/RenderingDocs/Quickstart.html#render-documenation-with-docker
for building locally.

Documentation/Developer/Contributing.rst

@@ -109,5 +109,3 @@ during development. Use :command:`ddev composer` from outside the container or j
   pull request - they are also run post-commit on
   `Github actions <https://github.com/dmind-gmbh/extension-cookieman/actions>`__.
 - :command:`ddev composer fix:cgl` tries to fix linting problems.
-- :command:`ddev composer build:docs` [+ any parameters, defaults to "makehtml"] builds documentation using the official
-  `TYPO3 docs team docker image <https://docs.typo3.org/m/typo3/docs-how-to-document/master/en-us/RenderingDocs/Quickstart.html>`__

composer.json

@@ -83,11 +83,6 @@
             "@build:prepare",
             "@build:prod"
         ],
-        "build:docs": [
-            "rm -rf ./Documentation-GENERATED-temp/Result/project/0.0.0/_buildinfo/",
-            "bash -c 'echo \"${@:-makehtml}\" | netcat docs 7000' --",
-            "cat ./Documentation-GENERATED-temp/Result/project/0.0.0/_buildinfo/warnings.txt 2>/dev/null"
-        ],
         "build:prepare": [
             "yarn install --save-dev --cwd=Build/"
         ],