[media] em28xx: remove some obsolete function declarations

Signed-off-by: Frank Schäfer <fschaefer.oss@googlemail.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/usb/em28xx/em28xx.h

@@ -654,11 +654,6 @@ int  em28xx_i2c_register(struct em28xx *dev);
 int  em28xx_i2c_unregister(struct em28xx *dev);
 
 /* Provided by em28xx-core.c */
-
-u32 em28xx_request_buffers(struct em28xx *dev, u32 count);
-void em28xx_queue_unusedframes(struct em28xx *dev);
-void em28xx_release_buffers(struct em28xx *dev);
-
 int em28xx_read_reg_req_len(struct em28xx *dev, u8 req, u16 reg,
 			    char *buf, int len);
 int em28xx_read_reg_req(struct em28xx *dev, u8 req, u16 reg);
@@ -691,7 +686,6 @@ int em28xx_init_usb_xfer(struct em28xx *dev, enum em28xx_mode mode,
 					(struct em28xx *dev, struct urb *urb));
 void em28xx_uninit_usb_xfer(struct em28xx *dev, enum em28xx_mode mode);
 void em28xx_stop_urbs(struct em28xx *dev);
-int em28xx_isoc_dvb_max_packetsize(struct em28xx *dev);
 int em28xx_set_mode(struct em28xx *dev, enum em28xx_mode set_mode);
 int em28xx_gpio_set(struct em28xx *dev, struct em28xx_reg_seq *gpio);
 void em28xx_wake_i2c(struct em28xx *dev);
@@ -710,10 +704,8 @@ int em28xx_stop_vbi_streaming(struct vb2_queue *vq);
 extern const struct v4l2_ctrl_ops em28xx_ctrl_ops;
 
 /* Provided by em28xx-cards.c */
-extern int em2800_variant_detect(struct usb_device *udev, int model);
 extern struct em28xx_board em28xx_boards[];
 extern struct usb_device_id em28xx_id_table[];
-extern const unsigned int em28xx_bcount;
 int em28xx_tuner_callback(void *ptr, int component, int command, int arg);
 void em28xx_release_resources(struct em28xx *dev);