fixed multiple define

qgroundcontrol.pro

@@ -430,7 +430,6 @@ contains (DEFINES, QGC_ENABLE_PAIRING) {
 HEADERS += \
     src/QmlControls/QmlUnitsConversion.h \
     src/Vehicle/VehicleEscStatusFactGroup.h \
-    src/Vehicle/VehicleHygrometerFactGroup.h \
     src/api/QGCCorePlugin.h \
     src/api/QGCOptions.h \
     src/api/QGCSettings.h \
@@ -444,7 +443,6 @@ contains (DEFINES, QGC_ENABLE_PAIRING) {
 
 SOURCES += \
     src/Vehicle/VehicleEscStatusFactGroup.cc \
-    src/Vehicle/VehicleHygrometerFactGroup.cc \
     src/api/QGCCorePlugin.cc \
     src/api/QGCOptions.cc \
     src/api/QGCSettings.cc \