📝 T-062 Remove .env.example and update documentation references

Author: densmirnov

.env.example

@@ -17,9 +17,6 @@
   - preserve `docs/agentctl.md` when present,
   - recreate an empty, checksum-valid `tasks.json`,
   - stage the right minimal file set after `git init`.
-- Replace committed secrets with a safe template:
-  - add `.env.example`
-  - tighten `.gitignore` for `.env` variants.
 
 ## Verification