Remove Integration sections from skills

These sections don't help with steering and are a legacy of the time
before agents had native skills systems.

skills/finishing-a-development-branch/SKILL.md

@@ -249,12 +249,3 @@ git worktree prune  # Self-healing: clean up any stale registrations
 - Clean up worktree for Options 1 & 4 only
 - `cd` to main repo root before worktree removal
 - Run `git worktree prune` after removal
-
-## Integration
-
-**Called by:**
-- **subagent-driven-development** (Step 7) - After all tasks complete
-- **executing-plans** (Step 5) - After all batches complete
-
-**Pairs with:**
-- **using-git-worktrees** - Cleans up worktree created by that skill

skills/using-git-worktrees/SKILL.md

@@ -213,13 +213,3 @@ Ready to implement <feature-name>
 - Verify directory is ignored for project-local
 - Auto-detect and run project setup
 - Verify clean test baseline
-
-## Integration
-
-**Called by:**
-- **subagent-driven-development** - Ensures isolated workspace (creates one or verifies existing)
-- **executing-plans** - Ensures isolated workspace (creates one or verifies existing)
-- Any skill needing isolated workspace
-
-**Pairs with:**
-- **finishing-a-development-branch** - REQUIRED for cleanup after work complete