diff --git a/src/__tests__/utils/fillBooleanArray.test.ts b/src/__tests__/utils/fillBooleanArray.test.ts
deleted file mode 100644
index 94e97f75e59..00000000000
--- a/src/__tests__/utils/fillBooleanArray.test.ts
+++ /dev/null
@@ -1,33 +0,0 @@
-import fillBooleanArray from '../../utils/fillBooleanArray';
-
-describe('filterBooleanArray', () => {
-  it('should be filtered array', () => {
-    expect(
-      fillBooleanArray([
-        { test: 'test', test1: 'test1' },
-        'test2',
-        { test3: 'test3', test4: 'test4' },
-      ]),
-    ).toEqual([
-      {
-        test: true,
-        test1: true,
-      },
-      true,
-      { test3: true, test4: true },
-    ]);
-  });
-
-  it('should be filtered object', () => {
-    expect(fillBooleanArray({ test: 'test', test1: 'test1' })).toEqual([
-      {
-        test: true,
-        test1: true,
-      },
-    ]);
-  });
-
-  it('should be filtered string', () => {
-    expect(fillBooleanArray('test')).toEqual([true]);
-  });
-});
diff --git a/src/__tests__/utils/isSelectInput.test.ts b/src/__tests__/utils/isSelectInput.test.ts
deleted file mode 100644
index 232c7a37f61..00000000000
--- a/src/__tests__/utils/isSelectInput.test.ts
+++ /dev/null
@@ -1,7 +0,0 @@
-import isRadioInput from '../../utils/isSelectInput';
-
-describe('isSelectInput', () => {
-  it('should return true when type is select-one', () => {
-    expect(isRadioInput({ name: 'test', type: 'select-one' })).toBeTruthy();
-  });
-});
diff --git a/src/constants.ts b/src/constants.ts
index fd5ec47f892..66bffdb0b06 100644
--- a/src/constants.ts
+++ b/src/constants.ts
@@ -21,17 +21,3 @@ export const INPUT_VALIDATION_RULES = {
   required: 'required',
   validate: 'validate',
 } as const;
-
-export const FORM_DEFAULT_STATE = {
-  isDirty: false,
-  isValidating: false,
-  isSubmitted: false,
-  isSubmitting: false,
-  isSubmitSuccessful: false,
-  isValid: false,
-  submitCount: 0,
-  dirtyFields: {},
-  touchedFields: {},
-  errors: {},
-  disabled: false,
-} as const;
diff --git a/src/utils/fillBooleanArray.ts b/src/utils/fillBooleanArray.ts
deleted file mode 100644
index 0b01a48767b..00000000000
--- a/src/utils/fillBooleanArray.ts
+++ /dev/null
@@ -1,17 +0,0 @@
-import convertToArrayPayload from './convertToArrayPayload';
-import isObject from './isObject';
-
-export default <T>(value: T) =>
-  (convertToArrayPayload(value) as T[]).map((data) => {
-    if (isObject(data)) {
-      const object: Record<string, boolean> = {};
-
-      for (const key in data) {
-        object[key] = true;
-      }
-
-      return object;
-    }
-
-    return true;
-  });
diff --git a/src/utils/isSelectInput.ts b/src/utils/isSelectInput.ts
deleted file mode 100644
index 6af9bb974fd..00000000000
--- a/src/utils/isSelectInput.ts
+++ /dev/null
@@ -1,4 +0,0 @@
-import { FieldElement } from '../types';
-
-export default (element: FieldElement): element is HTMLSelectElement =>
-  element.type === 'select-one';
diff --git a/src/utils/omit.ts b/src/utils/omit.ts
deleted file mode 100644
index 15ad077bdb9..00000000000
--- a/src/utils/omit.ts
+++ /dev/null
@@ -1,9 +0,0 @@
-export default <Key extends string, T extends Record<Key, any>>(
-  source: T,
-  key: Key,
-): Omit<T, Key> => {
-  const copy = { ...source };
-  delete copy[key];
-
-  return copy;
-};