staging: pi433: remove unused rf69_set_rx_start_timeout function

Function rf69_set_rx_start_timeout is unused and should be removed.

Signed-off-by: Marcin Ciupak <marcin.s.ciupak@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/pi433/rf69.c

@@ -591,13 +591,6 @@ int rf69_set_rssi_threshold(struct spi_device *spi, u8 threshold)
 	return rf69_write_reg(spi, REG_RSSITHRESH, threshold);
 }
 
-int rf69_set_rx_start_timeout(struct spi_device *spi, u8 timeout)
-{
-	/* no value check needed - u8 exactly matches register size */
-
-	return rf69_write_reg(spi, REG_RXTIMEOUT1, timeout);
-}
-
 int rf69_set_preamble_length(struct spi_device *spi, u16 preambleLength)
 {
 	int retval;

drivers/staging/pi433/rf69.h

@@ -50,7 +50,6 @@ int rf69_set_dio_mapping(struct spi_device *spi, u8 DIONumber, u8 value);
 bool rf69_get_flag(struct spi_device *spi, enum flag flag);
 int rf69_reset_flag(struct spi_device *spi, enum flag flag);
 int rf69_set_rssi_threshold(struct spi_device *spi, u8 threshold);
-int rf69_set_rx_start_timeout(struct spi_device *spi, u8 timeout);
 int rf69_set_preamble_length(struct spi_device *spi, u16 preambleLength);
 int rf69_enable_sync(struct spi_device *spi);
 int rf69_disable_sync(struct spi_device *spi);