Objective:
Remove clearComponentColumnMaps and cleanupComponentInstances methods from Neo.grid.Body. These methods are obsolete artifacts from the pre-Row-Pooling architecture and are causing crashes (TypeError: Cannot read properties of undefined (reading 'forEach')) because column.map no longer exists.

Context:

• Old Architecture: GridBody managed component instances (e.g., Sparklines) using column.map.
• New Architecture: Neo.grid.Row manages its own component instances in this.components and cleans them up in its destroy() method.
• The Bug: Unit tests exposed that GridBody was still attempting to access column.map during destroy() and onStoreLoad(), causing a hard crash.

Changes Required:

1. File: src/grid/Body.mjs
2. Action: Delete clearComponentColumnMaps and cleanupComponentInstances.
3. Action: Remove calls to these methods from destroy(), afterSetStore(), and onStoreLoad().

Verification:

• Ensure test/playwright/unit/grid/Teleportation.spec.mjs no longer crashes with TypeError.
• Verify no regressions in component column demos.

Related:

• Follow-up to ticket Refactor Grid.Body to extend Component.Base and use internal Row Pool #9017 (Grid Body Refactor).
• Unit Test failure in Teleportation.spec.mjs.