chore(copilot): drop the column-type import the delegation made dead

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

Author: TheodoreSpeaks

apps/sim/lib/copilot/tools/server/table/user-table.ts

@@ -29,7 +29,6 @@ import {
 import { namedRowMapper } from '@/lib/table/cell-format'
 import { buildIdByName, rowDataNameToId, sortSpecNamesToIds } from '@/lib/table/column-keys'
 import { columnTypeForLeaf, deriveOutputColumnName } from '@/lib/table/column-naming'
-import { columnTypeById } from '@/lib/table/column-types'
 import {
   addTableColumn,
   deleteColumn,