remove unused envelope vis

Detector/DetCRD/compact/CRD_common_v01/Beampipe_v01_01.xml

@@ -15,7 +15,7 @@
   <detectors>        
     <detector name="BeamPipe" type="DD4hep_CRDBeamPipe_v01" vis="BeamPipeVis">
       <parameter crossingangle="CrossingAngle" />
-      <envelope vis="BlueVis">
+      <envelope>
 	<shape type="Assembly"/>
       </envelope>
 

Detector/DetCRD/compact/CRD_common_v01/DC_Simple_v01_01.xml

@@ -54,7 +54,7 @@
   <detectors>
     <detector id="DetID_DC" name="DriftChamber" type="DriftChamber" readout="DriftChamberHitsCollection" vis="DCVis" sensitive="true" region="DriftChamberRegion" limits="DC_limits">
       <chamber id="0"/>
-      <envelope vis="SeeThrough">
+      <envelope>
         <shape type="BooleanShape" operation="Union" material="Air">
           <shape type="Tube" rmin="SDT_radius_min" rmax="SDT_radius_max" dz="SDT_half_length" />
         </shape>

Detector/DetCRD/compact/CRD_common_v01/FTD_SimpleStaggered_v01_01.xml

@@ -22,7 +22,7 @@
 
   <detectors>
     <detector id="DetID_FTD" name="FTD" type="FTD_Simple_Staggered" vis="FTDVis" readout="FTDCollection" insideTrackingVolume="true">
-      <envelope vis="FTDVis">
+      <envelope>
         <shape type="BooleanShape" operation="Subtraction" material="Air" >
           <shape type="BooleanShape" operation="Subtraction" material="Air" >
             <shape type="BooleanShape" operation="Subtraction" material="Air" >

Detector/DetCRD/compact/CRD_common_v01/FTD_SimpleStaggered_v01_02.xml

@@ -21,7 +21,7 @@
 
   <detectors>
     <detector id="DetID_FTD" name="FTD" type="FTD_Simple_Staggered" vis="FTDVis" readout="FTDCollection" insideTrackingVolume="true">
-      <envelope vis="FTDVis">
+      <envelope>
         <shape type="BooleanShape" operation="Subtraction" material="Air" >
           <shape type="BooleanShape" operation="Subtraction" material="Air" >
             <shape type="BooleanShape" operation="Subtraction" material="Air" >

Detector/DetCRD/compact/CRD_common_v01/SET_SimplePlanar_v01_02.xml

@@ -8,7 +8,7 @@
 
   <detectors>
     <detector id="DetID_SET" name="SET" type="SET_Simple_Planar" vis="SETVis" readout="SETCollection" insideTrackingVolume="true">
-      <envelope vis="SETVis">
+      <envelope>
 	<shape type="BooleanShape" operation="Union" material="Air" >
 	  <shape type="Tube" rmin="InnerTracker_outer_radius" rmax="OuterTracker_inner_radius" dz="SET_half_length"  material = "Air" />
 	  <shape type="Tube" rmin="SET_inner_radius" rmax="SET_outer_radius" dz="SET_half_length"  material = "Air" />

Detector/DetCRD/compact/CRD_common_v01/SIT_SimplePlanar_v01_01.xml

@@ -13,7 +13,7 @@
 
   <detectors>
     <detector id="DetID_SIT" name="SIT" type="SIT_Simple_Planar" vis="SITVis" readout="SITCollection" insideTrackingVolume="true">
-      <envelope vis="SeeThrough">
+      <envelope>
         <shape type="BooleanShape" operation="Union" material="Air" >
           <shape type="Tube" rmin="SIT_inner_radius"   rmax="SIT_outer_radius_1" dz="SIT_half_length_1" />
           <shape type="Tube" rmin="SIT_inner_radius_2" rmax="SIT_outer_radius"   dz="SIT_half_length" />