Remove\null PerformContext when passed into Schedule

[KLuuKer]

some people (i fixed my code already) include a PerformContext into the arguments when scheduling jobs (for example from inside a job)

Example:
BackgroundJob.Enqueue(() => new MyJobClass().SomeMethod(performContext, foo, bar));

Expected: a null as argument stored in the database

Actually: the full perfomContext is serialized in whole and stored in the database

when some job is queueing\scheduling other jobs, and maybe a couple of layers deep you end up with a whole bunch of nested PerfomContext's nested inside each other
so it would be nice to prevent this, and some users may do this without knowing this is very bad

Versions:
Hangfire.Core 1.6.22
Hangfire.SqlServer 1.6.22