Manual: tests: remove stale instructions on test subsets
I don't have time to fix these now, but having wrong docs is worse than having no docs, so in the interest of DRY, just pointing to the instructions in gmakefile
which seem more current.
I don't have time to fix these now, but having wrong docs is worse than having no docs, so in the interest of DRY, just pointing to the instructions in gmakefile
which seem more current.