Cleanup: Remove unused #includes in stan/math and tests (~minus 3kLOC) - #3470

Cleanup: Remove unused #includes in stan/math and tests (~minus 3kLOC)#3470

jachymb wants to merge 4 commits into

stan-dev:developstan-dev/math:developfrom

jachymb:feature/remove-unused-includesjachymb/math:feature/remove-unused-includesCopy head branch name to clipboard