chore(plugins): remove stale SKILL.md stubs from plugin skill dirs

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

plugins/gitea/skills/gitea-issues/SKILL.md

@@ -1,10 +0,0 @@
----
-name: gitea-issues
-description: >
-  Use when you want to create, list, update, label, or close Gitea issues
-  via the Gitea MCP server. Stub — full content not yet written.
-metadata:
-  category: operate
----
-
-> **Stub.** This skill is a placeholder. Content will be authored in a future workstream.

plugins/gitea/skills/gitea-milestones/SKILL.md

@@ -1,10 +0,0 @@
----
-name: gitea-milestones
-description: >
-  Use when you want to create, update, or close Gitea milestones and assign
-  issues to them. Stub — full content not yet written.
-metadata:
-  category: operate
----
-
-> **Stub.** This skill is a placeholder. Content will be authored in a future workstream.

plugins/gitea/skills/gitea-prs/SKILL.md

@@ -1,10 +0,0 @@
----
-name: gitea-prs
-description: >
-  Use when you want to open, review, merge, or close Gitea pull requests
-  via the Gitea MCP server. Stub — full content not yet written.
-metadata:
-  category: operate
----
-
-> **Stub.** This skill is a placeholder. Content will be authored in a future workstream.

plugins/gitea/skills/gitea-releases/SKILL.md

@@ -1,10 +0,0 @@
----
-name: gitea-releases
-description: >
-  Use when you want to create, update, publish, or delete Gitea releases
-  and associated tags. Stub — full content not yet written.
-metadata:
-  category: deploy
----
-
-> **Stub.** This skill is a placeholder. Content will be authored in a future workstream.

plugins/gitea/skills/gitea-wiki/SKILL.md

@@ -1,10 +0,0 @@
----
-name: gitea-wiki
-description: >
-  Use when you want to create, read, update, or delete Gitea wiki pages
-  in a repository. Stub — full content not yet written.
-metadata:
-  category: operate
----
-
-> **Stub.** This skill is a placeholder. Content will be authored in a future workstream.