Remove unmaintained Kibana version 4.2.x
Remove unmaintained Kibana version 4.2.x

Closes #1149.

Signed-off-by: Mike McQuaid <a17fed27eaa842282862ff7c1b9c8395a26ac320@mikemcquaid.com>

heuermh/homebrew-versions,UniqMartin/homebrew-versions,Ashton-W/homebrew-versions,coeligena/homebrew-verscustomized,DomT4/homebrew-versions,jimhe/homebrew-versions