Revert "Make cycle time optional"

This reverts commit 3048e4dbc6.
Without a CT line vbit2 defaults to 1 cycle which could be too fast on
magazines with very few pages.

pageoptionsdockwidget.h

@@ -40,7 +40,6 @@ public:
 private:
 	TeletextWidget *m_parentMainWidget;
 	QLineEdit *m_pageNumberEdit, *m_pageDescriptionEdit;
-	QCheckBox *m_cycleOnCheckBox;
 	QSpinBox *m_cycleValueSpinBox;
 	QComboBox *m_cycleTypeCombo;
 	QCheckBox *m_controlBitsAct[8];
@@ -57,9 +56,6 @@ private:
 	void setSecondNOS();
 	void updateDefaultNOSOptions();
 	void updateSecondNOSOptions();
-
-private slots:
-	void setCycleOn(bool active);
 };
 
 struct languageComboBoxItem {