scons: Get rid of SourceFile's done function.

This function doesn't seem to be used by anything. A similar one off
mechanism exists for SimObjects which is we might also be able to get
rid of.

Change-Id: I65038c3495fa69cf94042dc78f09876d5e9a557f
Reviewed-on: https://gem5-review.googlesource.com/5841
Maintainer: Gabe Black <gabeblack@google.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
1 file changed