feat: use custom validation instead of vuelidate

app/javascript/shared/mixins/specs/automationMixin.spec.js

@@ -1,5 +1,4 @@
 import methodsMixin from '../../../dashboard/mixins/automations/methodsMixin';
-import validationsMixin from '../../../dashboard/mixins/automations/validationsMixin';
 import {
   automation,
   customAttributes,
@@ -449,13 +448,3 @@ describe('automationMethodsMixin', () => {
     );
   });
 });
-
-describe('automationValidationsMixin', () => {
-  it('automationValidationsMixin is present', () => {
-    const data = () => {
-      return {};
-    };
-    const wrapper = createComponent([validationsMixin], data, {}, {});
-    expect(typeof wrapper.vm.$options.validations).toBe('object');
-  });
-});