Remove interrupt free section in remap_pins

Since we take `&mut` references, there's no reason disable interrupts

Author: david-sawatzke

src/usb.rs

@@ -49,10 +49,8 @@ unsafe impl UsbPeripheral for Peripheral {
 /// Remap PA11/PA12 pins to PA09/PA10 for USB on
 /// TSSOP20 (STM32F042F) or UFQFPN28 (STM32F042G) packages
 pub fn remap_pins(rcc: &mut RCC, syscfg: &mut SYSCFG) {
-    cortex_m::interrupt::free(|_| {
-        rcc.apb2enr.modify(|_, w| w.syscfgen().set_bit());
-        syscfg.cfgr1.modify(|_, w| w.pa11_pa12_rmp().remapped());
-    });
+    rcc.apb2enr.modify(|_, w| w.syscfgen().set_bit());
+    syscfg.cfgr1.modify(|_, w| w.pa11_pa12_rmp().remapped());
 }
 
 pub type UsbBusType = UsbBus<Peripheral>;