chore: drop the duplicated package versions from root apm.yml

The six packages[].version lines restated each plugin's own apm.yml
version and were unpoliced: on drift apm silently shipped the curator
value. apm reads the plugin's apm.yml when the entry is absent, and
apm pack --check-versions --check-clean still passes with the committed
marketplace.json unchanged. Simplification audit finding 33.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

apm.yml

@@ -77,35 +77,29 @@ marketplace:
     - name: kyberforge
       description: Skills and agents for creating, maintaining, and managing a Claude Code / Copilot CLI plugin marketplace.
       source: ./plugins/kyberforge
-      version: 2.0.0
       category: Developer Tools
 
     - name: bin
       description: Skills for everyday AI-assisted development work that is not tied to a single tool, forge or language, and has not yet been split into a focused plugin.
       source: ./plugins/bin
-      version: 1.1.7
       category: Utilities
 
     - name: git
       description: Skills and agents for working with a local Git clone over the git wire protocol, and for authoring and running the pre-commit hooks that guard it.
       source: ./plugins/git
-      version: 1.3.7
       category: Version Control
 
     - name: gitea
       description: Skills and agents for working with a Gitea forge through its HTTP API — the forge's own objects, as distinct from the local git clone.
       source: ./plugins/gitea
-      version: 1.3.8
       category: Version Control
 
     - name: core
       description: Skills for authoring and auditing a repo's AGENTS.md and the provider adapter files that defer to it.
       source: ./plugins/core
-      version: 1.1.2
       category: Productivity
 
     - name: lint
       description: Skills and agents for configuring and running linters.
       source: ./plugins/lint
-      version: 1.1.7
       category: Developer Tools