Remove unnecessary imports

Author: eldruin

src/adc.rs

@@ -1,7 +1,5 @@
 //! Analog-digital conversion traits
 
-use nb;
-
 /// A marker trait to identify MCU pins that can be used as inputs to an ADC channel.
 ///
 /// This marker trait denotes an object, i.e. a GPIO pin, that is ready for use as an input to the

src/capture.rs

@@ -1,7 +1,5 @@
 //! Input capture
 
-use nb;
-
 /// Input capture
 ///
 /// # Examples

src/serial.rs

@@ -1,7 +1,5 @@
 //! Serial interface
 
-use nb;
-
 /// Read half of a serial interface
 ///
 /// Some serial interfaces support different data sizes (8 bits, 9 bits, etc.);

src/spi.rs

@@ -1,7 +1,5 @@
 //! Serial Peripheral Interface
 
-use nb;
-
 /// Full duplex (master mode)
 ///
 /// # Notes

src/timer.rs

@@ -1,7 +1,5 @@
 //! Timers
 
-use nb;
-
 /// A count down timer
 ///
 /// # Contract