Revert "add missing depends_on"

This reverts commit ef484350121be388e8992788d75a273a1a2d1b40.
Revert "copy/paste typo"

This reverts commit f4319869e8c468fc2bc67d8b0cc86f39268dd5f0.
Revert "gmp4-gcc48 for boost-gcc48"

This reverts commit 43bf44087e8b3cf0edb846ca04059e0d37c07147.