drm/i915: remove unused intel_dvo_dev_ops hooks

struct intel_dvo_dev_ops's ::create_resources(), ::prepare(),
::commit::, and get_modes() are all unused since their addition in
79e53945 (DRM: i915: add mode setting support). Drop all of them.

Found by https://github.com/jirislaby/clang-struct.
Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Cc: intel-gfx@lists.freedesktop.org
Acked-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240216065326.6910-2-jirislaby@kernel.org

drivers/gpu/drm/i915/display/intel_dvo_dev.h

@@ -53,12 +53,6 @@ struct intel_dvo_dev_ops {
 	bool (*init)(struct intel_dvo_device *dvo,
 		     struct i2c_adapter *i2cbus);
 
-	/*
-	 * Called to allow the output a chance to create properties after the
-	 * RandR objects have been created.
-	 */
-	void (*create_resources)(struct intel_dvo_device *dvo);
-
 	/*
 	 * Turn on/off output.
 	 *
@@ -79,16 +73,6 @@ struct intel_dvo_dev_ops {
 	enum drm_mode_status (*mode_valid)(struct intel_dvo_device *dvo,
 					   struct drm_display_mode *mode);
 
-	/*
-	 * Callback for preparing mode changes on an output
-	 */
-	void (*prepare)(struct intel_dvo_device *dvo);
-
-	/*
-	 * Callback for committing mode changes on an output
-	 */
-	void (*commit)(struct intel_dvo_device *dvo);
-
 	/*
 	 * Callback for setting up a video mode after fixups have been made.
 	 *
@@ -111,15 +95,6 @@ struct intel_dvo_dev_ops {
 	 */
 	bool (*get_hw_state)(struct intel_dvo_device *dev);
 
-	/**
-	 * Query the device for the modes it provides.
-	 *
-	 * This function may also update MonInfo, mm_width, and mm_height.
-	 *
-	 * \return singly-linked list of modes or NULL if no modes found.
-	 */
-	struct drm_display_mode *(*get_modes)(struct intel_dvo_device *dvo);
-
 	/**
 	 * Clean up driver-specific bits of the output
 	 */