Remove hello-world docs #7854

Job	Run time
lock_check (ubuntu-latest, 3.10.9)	1m 54s
copyright_doc_and_dependencies_check (ubuntu-latest, 3.10.9)	4m 28s
lock_check (macos-latest, 3.10.9)	3m 36s
linter_checks (ubuntu-latest, 3.10.9)	9m 28s
lock_check (windows-latest, 3.10.9)	6m 10s
gitleaks	29s
e2e (ubuntu-latest, 3.10.9)	1h 56m 17s
test (ubuntu-latest, 3.8)	20m 3s
test (ubuntu-latest, 3.9)	20m 25s
test (ubuntu-latest, 3.10.9)	20m 1s
test (ubuntu-latest, 3.11)	24m 49s
test (macos-latest, 3.8)	9m 51s
test (macos-latest, 3.9)	12m 59s
test (macos-latest, 3.10.9)	8m 14s
test (macos-latest, 3.11)	12m 33s
test (windows-latest, 3.8)	12m 42s
test (windows-latest, 3.9)	11m 38s
test (windows-latest, 3.10.9)	15m 32s
test (windows-latest, 3.11)	12m 32s
	5h 23m 41s

Provide feedback