0024830: Remove redundant keyword 'mutable' in CDL declarations

Redundant keyword 'mutable' removed in CDL files.
In IGESConvGeom_GeomBuilder, unused methods MakeXY() and MakeXYZ() removed.
Method StepAP214_AutoDesignGroupAssignment::Init() replicating same method of the base class is removed as it causes CDL extraction error after above (seemingly irrelevant) changes.

src/MAT/MAT_Arc.cdl

@@ -41,7 +41,7 @@ is
              FirstElement    : BasicElt from MAT;
              SecondElement   : BasicElt from MAT )
     	--- Purpose :
-    returns mutable Arc;
+    returns Arc;
 
     Index (me) 
     	--- Purpose : Returns the index of <me> in Graph.theArcs.
@@ -66,12 +66,12 @@ is
     
     FirstNode (me)  
         --- Purpose : Returns one Node extremity of <me>.
-    returns mutable Node from MAT
+    returns Node from MAT
     is static;
     
     SecondNode (me) 
   	--- Purpose : Returns the other Node extremity of <me>.   
-    returns mutable Node from MAT
+    returns Node from MAT
     is static;    
     
     TheOtherNode (me ; aNode : Node) 

src/MAT/MAT_BasicElt.cdl

@@ -31,7 +31,7 @@ is
     
     Create (anInteger : Integer) 
     	--- Purpose : Constructor, <anInteger> is the <index> of <me>.
-    returns mutable BasicElt from MAT;
+    returns BasicElt from MAT;
 
     StartArc(me)  
     	--- Purpose : Return <startArcLeft> or <startArcRight> corresponding

src/MAT/MAT_Bisector.cdl

@@ -33,7 +33,7 @@ is
 
     ---Purpose:
 
-    returns mutable Bisector from MAT;
+    returns Bisector from MAT;
     
     AddBisector(me ; abisector : any Bisector from MAT)
     

src/MAT/MAT_Edge.cdl

@@ -31,7 +31,7 @@ uses
 
 is
 
-    Create returns mutable Edge from MAT;
+    Create returns Edge from MAT;
     
     EdgeNumber(me : mutable ; anumber : Integer)
 

src/MAT/MAT_Graph.cdl

@@ -33,7 +33,7 @@ uses BasicElt                  from MAT,
 
 is
 
-    Create returns mutable Graph from MAT;
+    Create returns Graph from MAT;
         --- Purpose : Empty constructor.
   
 ---Category: Computation
@@ -123,8 +123,8 @@ is
     is static;					    
 
     FusionOfArcs (me        : mutable;
-                  Arc1      : mutable Arc from MAT;
-		  Arc2      : mutable Arc from MAT)
+                  Arc1      : Arc from MAT;
+		  Arc2      : Arc from MAT)
 	---Purpose: Merge two Arcs.  the second node of <Arc2> becomes
 	--          the  first node  of <Arc1>.  Update  of the  first
 	--          node and the neighbours of <Arc1>.
@@ -142,7 +142,7 @@ is
     is static;
 
     ChangeBasicElt(me : mutable ; Index : Integer)	
-    returns mutable BasicElt from MAT
+    returns BasicElt from MAT
     is static;
     
     UpDateNodes(me : mutable ; Index : in out Integer)

src/MAT/MAT_Node.cdl

@@ -33,7 +33,7 @@ is
     Create (GeomIndex     : Integer;
             LinkedArc     : Arc from MAT;
     	    Distance      : Real)
-    returns mutable Node from MAT;
+    returns Node from MAT;
     
     GeomIndex (me)
 	---Purpose: Returns the index associated of the geometric 

src/MAT/MAT_TList.cdl

@@ -41,11 +41,11 @@ inherits
 
 is
 
-    Create returns mutable TListNode from MAT;
+    Create returns TListNode from MAT;
 
     ---C++: inline
     
-    Create(anitem : Item) returns mutable TListNode from MAT;
+    Create(anitem : Item) returns TListNode from MAT;
 
     ---C++: inline
     
@@ -56,13 +56,13 @@ is
     
     is static;
     
-    Next(me) returns mutable TListNode from MAT
+    Next(me) returns TListNode from MAT
     
     ---C++: inline
 
     is static;
     
-    Previous(me) returns mutable TListNode from MAT
+    Previous(me) returns TListNode from MAT
     
     ---C++: inline
 
@@ -74,13 +74,13 @@ is
 
     is static;
     
-    Next(me : mutable ; atlistnode : mutable TListNode from MAT)
+    Next(me : mutable ; atlistnode : TListNode from MAT)
     
     ---C++: inline
 
     is static;
     
-    Previous(me : mutable ; atlistnode : mutable TListNode from MAT)
+    Previous(me : mutable ; atlistnode : TListNode from MAT)
     
     ---C++: inline
 
@@ -100,7 +100,7 @@ end TListNode;
 
 is
 
-    Create returns mutable TList from MAT;
+    Create returns TList from MAT;
     
     First(me : mutable)
     

src/MAT/MAT_Zone.cdl

@@ -35,11 +35,11 @@ uses
     Node           from MAT
 is
 
-    Create returns mutable Zone from MAT;
+    Create returns Zone from MAT;
     
     Create(aBasicElt : BasicElt from MAT)
         --- Purpose: Compute the frontier of the Zone of proximity.
-    returns mutable Zone from MAT;
+    returns Zone from MAT;
     	
     Perform(me : mutable ; aBasicElt : BasicElt from MAT)
         --- Purpose: Compute the frontier of the Zone of proximity.