[editor] Remove method "hasAnswerScheme" in elements with AnswerScheme

...-elements/cloze/cloze-child-elements/text-field-simple.ts

...ound-elements/cloze/cloze-child-elements/toggle-button.ts

projects/common/models/elements/element.ts

projects/common/models/elements/geometry/geometry.ts

projects/common/models/elements/input-elements/checkbox.ts

projects/common/models/elements/input-elements/drop-list.ts

projects/common/models/elements/input-elements/dropdown.ts

...ts/common/models/elements/input-elements/hotspot-image.ts

projects/common/models/elements/input-elements/math-field.ts

...els/elements/input-elements/radio-button-group-complex.ts

...mmon/models/elements/input-elements/radio-button-group.ts

projects/common/models/elements/input-elements/slider.ts

...ts/common/models/elements/input-elements/spell-correct.ts

...s/common/models/elements/input-elements/text-area-math.ts

projects/common/models/elements/input-elements/text-area.ts

projects/common/models/elements/input-elements/text-field.ts