Bug#946064: figtree: drop build-dependencies on libfreehep-graphics*

[merkys]

Source: figtree
Version: 1.4.4-3
Severity: minor

Hello,

figtree has build-dependencies on libfreehep-graphics*, but these
packages are used neither in build, nor in runtime. So I assume it's
safe to drop them from build-deps.

Andrius