dynflag dependency addition in TcRnDriver is not needed anymore
The removed parts of the tcRnImports function in the attached patch says that there is a check in LoadIface.loadInterface and this is why it's needed to add the plugin dependencies to the EPS.
But actually [[GhcFile(compiler/iface/LoadIface.lhs#L227)]] says that the check is no longer there.
Edited by Simon Peyton Jones