message: fix: remove picker-column from components menu
  picker-column is only used internally and is excluded from the
  generated docs data.
diff: @@ -35,7 +35,6 @@ const items = {
  },
  'Date & Time Pickers': {
  'ion-datetime': '/docs/api/datetime',
  - 'ion-picker-column': '/docs/api/picker-column',
  'ion-picker-controller': '/docs/api/picker-controller',
  'ion-picker': '/docs/api/picker'
  },
  