Remove old indexer (#4101) #16934

Job	Run time
Verify Jekyll website builds	12s
build_node (windows-latest)	4m 23s
build_node (ubuntu-latest)	2m 28s
lint_node	30s
lint_ruby	29s
build_node (macos-latest)	2m 32s
Ruby 3.3 on ubuntu-latest	6m 59s
Ruby 3.4 on ubuntu-latest	6m 38s
Ruby 4.0 on macos-latest	3m 25s
Ruby 4.0 on ubuntu-latest	5m 14s
Ruby 3.4 on macos-latest	3m 37s
Ruby 3.3 on macos-latest	3m 25s
Ruby 3.4 on windows-latest	14m 12s
Ruby 4.0 on windows-latest	15m 35s
Ruby 3.3 on windows-latest	17m 29s
	1h 27m 8s

Provide feedback