a little rotorcraft airframe cleaning

conf/airframes/CDW/debug_i2c.xml

@@ -213,7 +213,6 @@
   <firmware name="rotorcraft">
 <!--     <define name="USE_PERSISTENT_SETTINGS"/> -->
 <!--     <define name="USE_INS_NAV_INIT"/> -->
-     <define name="USE_ADAPT_HOVER"/>
      <define name="FAILSAFE_GROUND_DETECT"/>
      <define name="USE_GPS_ACC4R"/>
      <target name="ap" board="lisa_l_1.0">

conf/airframes/ENAC/quadrotor/blender.xml

@@ -11,7 +11,6 @@
 
   <firmware name="rotorcraft">
     <define name="USE_INS_NAV_INIT"/>
-    <define name="USE_ADAPT_HOVER"/>
     <!--define name="GUIDANCE_H_USE_REF"/-->
 
     <target name="ap" board="booz_1.0">

conf/airframes/ENAC/quadrotor/booz2_g1.xml

@@ -15,7 +15,6 @@
 
   <firmware name="rotorcraft">
     <define name="USE_INS_NAV_INIT"/>
-    <define name="USE_ADAPT_HOVER"/>
     <!--define name="GUIDANCE_H_USE_REF"/-->
 
     <target name="ap" board="booz_1.0">

conf/airframes/ENAC/quadrotor/navgo.xml

@@ -10,7 +10,6 @@
 
   <firmware name="rotorcraft">
     <define name="USE_INS_NAV_INIT"/>
-    <define name="USE_ADAPT_HOVER"/>
     <define name="USE_ATTITUDE_REF" value="0"/>
     <!--define name="GUIDANCE_H_USE_REF"/-->
 
@@ -105,7 +104,6 @@
 
   <!-- Magnetic field for Toulouse (declination -16°) -->
   <section name="AHRS" prefix="AHRS_">
-    <define name="MAG_UPDATE_YAW_ONLY" value="1"/>
     <define name="PROPAGATE_FREQUENCY" value="512"/>
     <define name="H_X" value=" 0.513081"/>
     <define name="H_Y" value="-0.00242783"/>

conf/airframes/NoVa_L.xml

@@ -242,7 +242,6 @@
   <firmware name="rotorcraft">
 <!--     <define name="USE_PERSISTENT_SETTINGS"/> -->
 <!--     <define name="USE_INS_NAV_INIT"/> -->
-     <define name="USE_ADAPT_HOVER"/>
      <define name="FAILSAFE_GROUND_DETECT"/>
      <define name="USE_GPS_ACC4R"/>
      <target name="ap" board="lisa_l_1.0">

conf/airframes/Poine/booz2_a7.xml

@@ -214,7 +214,6 @@
   <firmware name="rotorcraft">
 <!--     <define name="USE_PERSISTENT_SETTINGS"/> -->
 <!--     <define name="USE_INS_NAV_INIT"/> -->
-     <define name="USE_ADAPT_HOVER"/>
      <define name="FAILSAFE_GROUND_DETECT"/>
      <define name="USE_GPS_ACC4R"/>
      <target name="ap" board="lisa_l_1.0">