synopsys: Remove compilation warning in dcd_edpt_close

dcd_edpt_close() no longer modifies FIFO distribution.
Code that that was commented out is removed along with
variables that are no longer used.
FIFO distribution among endpoints is handled upfront
and does not need to be modified in open and close endpoint
functions.

src/portable/st/synopsys/dcd_synopsys.c

@@ -809,20 +809,7 @@ static void dcd_edpt_disable (uint8_t rhport, uint8_t ep_addr, bool stall)
  */
 void dcd_edpt_close (uint8_t rhport, uint8_t ep_addr)
 {
-  USB_OTG_GlobalTypeDef * usb_otg = GLOBAL_BASE(rhport);
-
-  uint8_t const epnum = tu_edpt_number(ep_addr);
-  uint8_t const dir   = tu_edpt_dir(ep_addr);
-
   dcd_edpt_disable(rhport, ep_addr, false);
-//  if (dir == TUSB_DIR_IN)
-//  {
-//    uint16_t const fifo_size = (usb_otg->DIEPTXF[epnum - 1] & USB_OTG_DIEPTXF_INEPTXFD_Msk) >> USB_OTG_DIEPTXF_INEPTXFD_Pos;
-//    uint16_t const fifo_start = (usb_otg->DIEPTXF[epnum - 1] & USB_OTG_DIEPTXF_INEPTXSA_Msk) >> USB_OTG_DIEPTXF_INEPTXSA_Pos;
-//    // For now only endpoint that has FIFO at the end of FIFO memory can be closed without fuss.
-//    TU_ASSERT(fifo_start + fifo_size == _allocated_fifo_words,);
-//    _allocated_fifo_words -= fifo_size;
-//  }
 }
 
 void dcd_edpt_stall (uint8_t rhport, uint8_t ep_addr)