Remove unnecessary initialization of UBRR.

The register is overwritten with clock divider later.

Author: armandas

avr-hal-generic/src/usart_spi.rs

@@ -55,10 +55,6 @@ macro_rules! add_usart_spi {
                 fn raw_setup(&mut self, settings: &$crate::spi::Settings) {
                     use $crate::hal::spi;
 
-                    // Setup control registers
-                    // We start by setting the UBBRn to 0
-                    self.[<ubrr $n>].write(|w| unsafe {w.bits(0)});
-
                     // We have to translate the character size register into the 2 bits which are the MSB/LSB and the phase
                     // 5 Bit Char = MSB and 1st
                     // 6 Bit Char = MSB and 2nd