usb: phy: samsung: remove old USB 2.0 PHY driver

drivers/usb/phy/phy-samsung-usb2 driver got replaced by
drivers/phy/phy-samsung-usb2 one and is no longer used.

Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: Vivek Gautam <gautam.vivek@samsung.com>
Reviewed-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
Cc: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/phy/Kconfig

@@ -78,14 +78,6 @@ config SAMSUNG_USBPHY
 	  This driver provides common interface to interact, for Samsung USB 2.0 PHY
 	  driver and later for Samsung USB 3.0 PHY driver.
 
-config SAMSUNG_USB2PHY
-	tristate "Samsung USB 2.0 PHY controller Driver"
-	select SAMSUNG_USBPHY
-	select USB_PHY
-	help
-	  Enable this to support Samsung USB 2.0 (High Speed) PHY controller
-	  driver for Samsung SoCs.
-
 config SAMSUNG_USB3PHY
 	tristate "Samsung USB 3.0 PHY controller Driver"
 	select SAMSUNG_USBPHY