Wizard: Remove inPage prop and Modal hideTitle prop

[jschuler]

patternfly/patternfly-react#4140

Modal: Remove hideTitle prop. To hide the Modal header, do not pass a title prop, a description prop, or a header prop. If there is no title or header passed, please provide an aria-label prop to the Modal component to make it accessible.
Wizard: Remove inPage prop. By default the Wizard will be displayed in page, filling its parent container. If the consumer passes a managed isOpen flag, then the Wizard will be displayed in a modal.