Remove libcryptsetup COPR repo from Packit additional repos list

Since stratisd 3.9.1 release, stratisd can be built using standard
Fedora repos.

Signed-off-by: mulhern <amulhern@redhat.com>

Author: mulkieran

.packit.yaml

@@ -30,17 +30,13 @@ jobs:
     - job: copr_build
       identifier: copr_pull
       trigger: pull_request
-      additional_repos:
-          - copr://packit/stratis-storage-libcryptsetup-rs-master?priority=10
       targets:
           - fedora-all
 
     - job: copr_build
       identifier: copr_commit
       trigger: commit
       preserve_project: true
-      additional_repos:
-          - copr://packit/stratis-storage-libcryptsetup-rs-master?priority=10
       targets:
           - fedora-all