feat: Remove deprecated property

[deandreamatias]

Solution description

Fix beta lint pipeline

To Do

• Read contributing guide
• Check the original issue to confirm it is fully satisfied
• Add solution description to help guide reviewers
• Add unit test to verify new or fixed behaviour
• If apply, add documentation to code properties and package readme

[codecov]

Codecov Report

Merging #1140 (e7d92d0) into main (58c1f46) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #1140   +/-   ##
=======================================
  Coverage   71.55%   71.55%           
=======================================
  Files          19       19           
  Lines         696      696           
=======================================
  Hits          498      498           
  Misses        198      198           

Impacted Files	Coverage Δ
lib/src/fields/form_builder_switch.dart	92.30% <ø> (ø)
lib/src/widgets/grouped_checkbox.dart	74.54% <ø> (ø)
lib/src/widgets/grouped_radio.dart	79.24% <ø> (ø)

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