Revert "Merge pull request #354 from h-2/feature/reduced_aminoacid_module"

This reverts commit 6d12c4eca04087bacdeeaef7bd1addd28ef6986f, reversing
changes made to f975a2779e95eab55a0ba7fde436203af2726c0b.
Merge pull request #377 from weese/revert_pull_request_354

[FIX] Revert pull request 354