feat: remove cupertino segmented control

Author: deandreamatias

README.md

@@ -55,7 +55,6 @@ The currently supported fields include:
 - `FormBuilderFilterChip` - Creates a chip that acts like a checkbox
 - `FormBuilderRadioGroup` - Used to select one value from a list of Radio Widgets
 - `FormBuilderRangeSlider` - Used to select a range from a range of values
-- `FormBuilderSegmentedControl` - For selection of a value using the `CupertinoSegmentedControl` widget as an input
 - `FormBuilderSlider` - For selection of a numerical value on a slider
 - `FormBuilderSwitch` - On/Off switch field
 - `FormBuilderTextField` - A Material Design text field input

lib/flutter_form_builder.dart

@@ -13,7 +13,6 @@ export 'src/fields/form_builder_dropdown.dart';
 export 'src/fields/form_builder_filter_chips.dart';
 export 'src/fields/form_builder_radio_group.dart';
 export 'src/fields/form_builder_range_slider.dart';
-export 'src/fields/form_builder_segmented_control.dart';
 export 'src/fields/form_builder_slider.dart';
 export 'src/fields/form_builder_switch.dart';
 export 'src/fields/form_builder_text_field.dart';