revert usb.c additions

ports/stm32f4/boards/stm32f411ce_blackpill/mpconfigboard.h

@@ -33,7 +33,6 @@
 #define FLASH_PAGE_SIZE             (0x4000)
 
 #define BOARD_OSC_DIV 25
-#define BOARD_NO_VBUS
 
 // On-board flash
 // #define SPI_FLASH_MOSI_PIN          (&pin_PA07)

ports/stm32f4/supervisor/usb.c

@@ -43,7 +43,6 @@ void init_usb_hardware(void) {
     PA11     ------> USB_OTG_FS_DM
     PA12     ------> USB_OTG_FS_DP 
     */
-
     __HAL_RCC_GPIOA_CLK_ENABLE();
 
       /* Configure DM DP Pins */
@@ -84,14 +83,3 @@ void init_usb_hardware(void) {
     /* Peripheral clock enable */
     __HAL_RCC_USB_OTG_FS_CLK_ENABLE();
 }
-
-void disable_usb_vbus(void) {
-
-#ifdef USB_OTG_GCCFG_VBDEN
-    USB_OTG_FS->GCCFG &= ~USB_OTG_GCCFG_VBDEN;
-#else
-    USB_OTG_FS->GCCFG |= USB_OTG_GCCFG_NOVBUSSENS;
-    USB_OTG_FS->GCCFG &= ~USB_OTG_GCCFG_VBUSBSEN;
-    USB_OTG_FS->GCCFG &= ~USB_OTG_GCCFG_VBUSASEN;
-#endif
-}

supervisor/shared/usb/usb.c

@@ -33,8 +33,6 @@
 #include "lib/utils/interrupt_char.h"
 #include "lib/mp-readline/readline.h"
 
-#include "py/mpconfig.h"
-
 #include "tusb.h"
 
 // Serial number as hex characters. This writes directly to the USB
@@ -74,11 +72,6 @@ void usb_init(void) {
 #if CIRCUITPY_USB_MIDI
     usb_midi_init();
 #endif
-
-#ifdef BOARD_NO_VBUS
-    disable_usb_vbus();
-#endif
-
 }
 
 void usb_background(void) {

supervisor/usb.h

@@ -37,8 +37,6 @@ void usb_background(void);
 // TinyUSB.
 void init_usb_hardware(void);
 
-void disable_usb_vbus(void);
-
 // Shared implementation.
 bool usb_enabled(void);
 void usb_init(void);