Revert "Prevent doxygen from creating large graphs"
Revert "Prevent doxygen from creating large graphs"

This reverts commit 419b15a250064f9b32270fd5330cef0401b6bf00. The
segfaults are no longer present on Debian Sid, a package was fixed
(although not sure which).

simquest/opensurgsim,simquest/opensurgsim,simquest/opensurgsim,simquest/opensurgsim