Remove pipeline citations

They are all cited in the [Online Pipelines] section of the
[Public Alerts User Guide], which is reference at the end of the
Circular:

> For further information about analysis methodology and the
> contents of this alert, refer to the LIGO/Virgo Public Alerts User
> Guide <https://emfollow.docs.ligo.org/userguide/>.

[Online Pipelines]: https://emfollow.docs.ligo.org/userguide/procedures/searches.html
[Public Alerts User Guide]: https://emfollow.docs.ligo.org/userguide/
3 jobs for remove-citations in 6 minutes and 10 seconds (queued for 1 minute and 5 seconds)
latest
Status Job ID Name Coverage
  Build
passed build #272881

00:00:33

 
  Test
passed lint #272883

00:00:23

passed test #272882

00:05:37

86.0%