Description of problem:
The help for "--remove" option is missing in command line tool. The manual page contains it.
We could also consider to use "--store" option on separate line to be more visible than using it in the "usage" line.

i:x86_64|m:x86_64 root@sheep-6 [trust-sanity-test]# zcat $(rpm -ql p11-kit-trust | grep '/man1/trust.1.gz') | grep 'trust anchor.*remove'
$ trust anchor \-\-remove /path/to/certificate\&.crt
$ trust anchor \-\-remove "pkcs11:id=%AA%BB%CC%DD%EE;object\-type=cert"

i:x86_64|m:x86_64 root@sheep-6 [trust-sanity-test]# trust anchor --help | grep -- '--remove' || { trust anchor --help; echo FAIL; }
usage: trust anchor --store <file> ...

  -v, --verbose       show verbose debug output
  -q, --quiet         suppress command output
FAIL


Version-Release number of selected component (if applicable):
p11-kit-0.20.7-2.el7

How reproducible:
Always

Steps to Reproduce:
1. trust anchor --help | grep -- '--remove' && echo PASS || echo FAIL

Actual results:
FAIL

Expected results:
PASS ("--remove" option presents in command line help)

Additional info: