remove old JT links that are no longer live or available (#1104) #2160

Job	Run time
build-lint-test (ubuntu-latest, stable, helix)	33s
build-lint-test (ubuntu-latest, stable, sqlite)	46s
build-lint-test (ubuntu-latest, stable, basqlite)	51s
build-lint-test (ubuntu-latest, stable, external_printer)	1m 13s
build-lint-test (ubuntu-latest, stable, bashisms)	35s
build-lint-test (ubuntu-latest, stable, default)	34s
	4m 32s

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