Declaratory judgments — Jurisdiction — Complaint filed by applicant for rezoning after county amended its comprehensive plan, asked applicant to withdraw its application, and treated application as withdrawn after applicant declined to do so, seeking declaratory judgment finding that any further pursuit of plaintiff’s rezoning application was futile as a matter of law and that any claims for remedy for the injury to the rezoning applicant’s private property rights under Florida Constitution or state laws were ripe for adjudication did not fall within jurisdictional requirements of Declaratory Judgment Act — Plaintiff did not allege that it was in doubt as to existence or nonexistence of any immunity, power, privilege, status, or right — Summary judgment in favor of county reversed