Drop support for Fedora 28

Fedora 28 goes EOL in 8 days from the time of this writing, and
the fix for #3237[0] uses a backoff API that does not exist in
the version of backoff that is shipped with Fedora 28. Thus, it is
most sensible to go ahead and drop support for Fedora 28 with
Bodhi 4.0.0.

[0] #3237

Signed-off-by: Randy Barlow <[email protected]>

.mergify.yml

@@ -8,10 +8,6 @@ pull_request_rules:
   - label!=WIP
   - approved-reviews-by=@fedora-infra/bodhi
   - status-success=DCO
-  - status-success=f28-docs
-  - status-success=f28-unit
-  - status-success=f28-diff-cover
-  - status-success=f28-integration
   - status-success=f29-docs
   - status-success=f29-unit
   - status-success=f29-diff-cover
@@ -38,10 +34,6 @@ pull_request_rules:
   - author=@fedora-infra/bodhi
   - "#approved-reviews-by>=1"
   - status-success=DCO
-  - status-success=f28-docs
-  - status-success=f28-unit
-  - status-success=f28-diff-cover
-  - status-success=f28-integration
   - status-success=f29-docs
   - status-success=f29-unit
   - status-success=f29-diff-cover

devel/ci/bodhi-ci

@@ -39,7 +39,7 @@ CONTAINER_LABEL = 'purpose=bodhi-ci-{}'.format(uuid.uuid4())
 # This template is used to generate the summary lines that are printed out at the end.
 LABEL_TEMPLATE = '{:>8}-{:<34}'
 PROJECT_PATH = os.path.abspath(os.path.join(os.path.dirname(__file__), '..', '..'))
-RELEASES = ('f28', 'f29', 'f30', 'rawhide', 'pip')
+RELEASES = ('f29', 'f30', 'rawhide', 'pip')
 
 
 def _set_concurrency(ctx, param, value):

devel/ci/cico.pipeline

@@ -161,7 +161,6 @@ node('bodhi') {
 
         try {
             parallel(
-                f28: {test_release('f28')},
                 f29: {test_release('f29')},
                 f30: {test_release('f30')},
                 pip: {test_release('pip')},
@@ -171,7 +170,7 @@ node('bodhi') {
             failed = error
         }
 
-        def releases = ['f28', 'f29', 'f30', 'pip', 'rawhide']
+        def releases = ['f29', 'f30', 'pip', 'rawhide']
         for (release in releases) {
             try {
                 bodhi_ci(release, 'integration', 'integration', '--no-build --no-init')