fix: remove broken letta-code notification step from release workflow (#176)

The `if: ${{ secrets.LETTA_API_KEY != '' }}` expression caused a
workflow parse error (secrets can't be used in `if` conditions).
Also `custom_prompt` may not be a valid input for letta-code-action.

Stripped the step for now -- will re-add once letta-code-action
supports release events.

Written by Cameron ◯ Letta Code

"Simplicity is the ultimate sophistication."
- Leonardo da Vinci

.github/workflows/release.yml

@@ -103,17 +103,5 @@ jobs:
         env:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
-      # Optional: Ping letta-code agent to write a richer summary
-      - name: Notify Letta Code agent
-        if: ${{ secrets.LETTA_API_KEY != '' }}
-        continue-on-error: true
-        uses: letta-ai/letta-code-action@v0
-        with:
-          letta_api_key: ${{ secrets.LETTA_API_KEY }}
-          github_token: ${{ secrets.GITHUB_TOKEN }}
-          agent_id: agent-a7d61fda-62c3-44ae-90a0-c8359fae6e3d
-          model: opus
-          custom_prompt: |
-            A new release ${{ github.ref_name }} was just published for lettabot.
-            Review the release notes and add a comment on the release with a
-            brief, friendly summary of what's new for users. Keep it concise.
+      # TODO: Ping letta-code agent to write a richer summary once
+      # letta-code-action supports release events / custom prompts