chore: remove deprecated app functions

These were deprecated in 0.20.0 and are unused in Dokku's official codebases.

docs/appendices/0.30.0-migration-guide.md

@@ -10,3 +10,8 @@
     - `post-release-dockerfile`
     - `post-release-pack`
 - The ability to call `logs:failed` without specifying an app or `--all` flag has been removed. This was deprecated in 0.22.0. Please see the [logs:failed](/docs/deployment/logs.md#failed-deploy-logs).
+- The following app shell functions - deprecated since 0.20.0 - have been removed in favor of their plugin trigger equivalents. Sourcing the `app/functions` file will fail going forward.
+    - `apps#apps_create()` is removed in favor of `plugn trigger app-create`.
+    - `apps#apps_destroy()` is removed in favor of `plugn trigger app-destroy`.
+    - `apps#apps_exists()` is removed in favor of `plugn trigger app-exists`.
+    - `apps#apps_maybe_create()` is removed in favor of `plugn trigger app-maybe-create`.

plugins/apps/functions

@@ -1,41 +0,0 @@
-#!/usr/bin/env bash
-set -eo pipefail
-[[ $DOKKU_TRACE ]] && set -x
-source "$PLUGIN_CORE_AVAILABLE_PATH/common/functions"
-source "$PLUGIN_AVAILABLE_PATH/config/functions"
-
-apps_create() {
-  declare desc="verifies app name and creates an app"
-  declare APP="$1"
-  declare deprecated=true
-
-  dokku_log_warn "Deprecated: plugn#app-create"
-  plugn trigger app-create "$APP"
-}
-
-apps_destroy() {
-  declare desc="destroys an app"
-  declare APP="$1"
-  declare deprecated=true
-
-  dokku_log_warn "Deprecated: plugn#app-destroy"
-  plugn trigger app-destroy "$APP"
-}
-
-apps_exists() {
-  declare desc="checks if an app exists"
-  declare APP="$1"
-  declare deprecated=true
-
-  dokku_log_warn "Deprecated: plugn#app-exists"
-  plugn trigger app-exists "$APP"
-}
-
-apps_maybe_create() {
-  declare desc="creates an app dir if allowed"
-  declare APP="$1"
-  declare deprecated=true
-
-  dokku_log_warn "Deprecated: plugn#app-maybe-create"
-  plugn trigger app-maybe-create "$APP"
-}

plugins/git/functions

@@ -1,7 +1,6 @@
 #!/usr/bin/env bash
 source "$PLUGIN_CORE_AVAILABLE_PATH/common/functions"
 source "$PLUGIN_CORE_AVAILABLE_PATH/common/property-functions"
-source "$PLUGIN_AVAILABLE_PATH/apps/functions"
 source "$PLUGIN_AVAILABLE_PATH/config/functions"
 source "$PLUGIN_AVAILABLE_PATH/git/internal-functions"
 set -eo pipefail