Removes Serial1 from Redboard Turbo Variant

* There are two externs for Serial and Serial1 included in the header file. However only Serial1 is defined and so causes issues when compiling sketches that use Serial. Serial1 in my mind implies a Serial port so Serial1 has been removed.

Author: edspark

sparkfun/samd/variants/SparkFun_RedBoard_Turbo/variant.cpp

@@ -214,11 +214,11 @@ SERCOM sercom3( SERCOM3 ) ;
 SERCOM sercom4( SERCOM4 ) ;
 SERCOM sercom5( SERCOM5 ) ;
 
-Uart Serial1( &sercom0, PIN_SERIAL1_RX, PIN_SERIAL1_TX, PAD_SERIAL1_RX, PAD_SERIAL1_TX ) ;
+Uart Serial( &sercom0, PIN_SERIAL1_RX, PIN_SERIAL1_TX, PAD_SERIAL1_RX, PAD_SERIAL1_TX ) ;
 //Uart Serial( &sercom5, PIN_SERIAL_RX, PIN_SERIAL_TX, PAD_SERIAL_RX, PAD_SERIAL_TX ) ;
 void SERCOM0_Handler()
 {
-  Serial1.IrqHandler();
+  Serial.IrqHandler();
 }
 
 //void SERCOM5_Handler()

sparkfun/samd/variants/SparkFun_RedBoard_Turbo/variant.h

@@ -197,7 +197,6 @@ extern SERCOM sercom4;
 extern SERCOM sercom5;
 
 extern Uart Serial;
-extern Uart Serial1;
 
 #endif
 
@@ -219,8 +218,8 @@ extern Uart Serial1;
 #define SERIAL_PORT_USBVIRTUAL      SerialUSB
 #define SERIAL_PORT_MONITOR         SerialUSB
 // Serial has no physical pins broken out, so it's not listed as HARDWARE port
-#define SERIAL_PORT_HARDWARE        Serial1
-#define SERIAL_PORT_HARDWARE_OPEN   Serial1
+#define SERIAL_PORT_HARDWARE        Serial
+#define SERIAL_PORT_HARDWARE_OPEN   Serial
 
 #endif /* _VARIANT_ARDUINO_ZERO_ */