diff --git a/AntennaTracker/AntennaTracker.cpp b/AntennaTracker/AntennaTracker.cpp
index a0926baadb..2a60457149 100644
--- a/AntennaTracker/AntennaTracker.cpp
+++ b/AntennaTracker/AntennaTracker.cpp
@@ -112,11 +112,6 @@ void Tracker::one_second_loop()
     }
 }
 
-#if CONFIG_HAL_BOARD == HAL_BOARD_APM1
-// needed for APM1 inertialsensor driver
-AP_ADC_ADS7844 apm1_adc;
-#endif
-
 const AP_HAL::HAL& hal = AP_HAL::get_HAL();
 
 Tracker::Tracker(void)
diff --git a/AntennaTracker/Tracker.h b/AntennaTracker/Tracker.h
index c8b1fdd93a..634c9e1a59 100644
--- a/AntennaTracker/Tracker.h
+++ b/AntennaTracker/Tracker.h
@@ -44,7 +44,6 @@
 #include <AP_AHRS/AP_AHRS.h>         // ArduPilot Mega DCM Library
 #include <Filter/Filter.h>                     // Filter library
 #include <AP_Buffer/AP_Buffer.h>      // APM FIFO Buffer
-#include <AP_HAL_AVR/memcheck.h>
 
 #include <GCS_MAVLink/GCS_MAVLink.h>    // MAVLink GCS definitions
 #include <AP_SerialManager/AP_SerialManager.h>   // Serial manager library
diff --git a/AntennaTracker/system.cpp b/AntennaTracker/system.cpp
index b221357930..ebc8162cf3 100644
--- a/AntennaTracker/system.cpp
+++ b/AntennaTracker/system.cpp
@@ -241,16 +241,4 @@ void Tracker::check_usb_mux(void)
 
     // the user has switched to/from the telemetry port
     usb_connected = usb_check;
-
-#if CONFIG_HAL_BOARD == HAL_BOARD_APM2
-    // the APM2 has a MUX setup where the first serial port switches
-    // between USB and a TTL serial connection. When on USB we use
-    // SERIAL0_BAUD, but when connected as a TTL serial port we run it
-    // at SERIAL1_BAUD.
-    if (usb_connected) {
-        serial_manager.set_console_baud(AP_SerialManager::SerialProtocol_Console, 0);
-    } else {
-        serial_manager.set_console_baud(AP_SerialManager::SerialProtocol_MAVLink, 0);
-    }
-#endif
 }