Remove crossing angles to avoid duplicate definitions

Avoid errors such as

Evaluator        WARN  +++ Overwriting variable: name=CrossingAngle value=0.025  Evaluator::Object : existing variable [setVariable error]
Detector         WARN  +++ Object 'CrossingAngle' is already defined. New value will be ignored
Evaluator        WARN  +++ Overwriting variable: name=ionCrossingAngle value=0.0166667  Evaluator::Object : existing variable [setVariable error]
Detector         WARN  +++ Object 'ionCrossingAngle' is already defined. New value will be ignored
Evaluator        WARN  +++ Overwriting variable: name=electronCrossingAngle value=0.00833333  Evaluator::Object : existing variable [setVariable error]
Detector         WARN  +++ Object 'electronCrossingAngle' is already defined. New value will be ignored
Evaluator        WARN  +++ Overwriting variable: name=CrossingSlope value=0.0166682  Evaluator::Object : existing variable [setVariable error]
Detector         WARN  +++ Object 'CrossingSlope' is already defined. New value will be ignored

compact/definitions.xml

@@ -4,12 +4,6 @@
     <constant name="world_y" value="world_side"/>
     <constant name="world_z" value="100*m"/>
 
-    <comment>Although not explicit in the EIC design study, the crossing angle is not symmetric.</comment>
-    <constant name="CrossingAngle" value="0.025"/>
-    <constant name="ionCrossingAngle" value="0.0166667"/>
-    <constant name="electronCrossingAngle" value="0.00833333"/>
-    <constant name="CrossingSlope" value="0.0166682"/>
-
     <constant name="Pi" value="3.14159265359"/>
 
     <constant name="mil" value="0.0254*mm"/>