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/BRepTopAdaptor/BRepTopAdaptor_HVertex.cdl

@@ -31,7 +31,7 @@ is
 
     Create(Vtx: Vertex from TopoDS; Curve: HCurve2d from BRepAdaptor)
 
-    	returns mutable HVertex from BRepTopAdaptor;
+    	returns HVertex from BRepTopAdaptor;
 
 
     Vertex(me)
@@ -76,7 +76,7 @@ is
 	is redefined;
 
 
-    IsSame(me: mutable; Other: mutable like me)
+    IsSame(me: mutable; Other: like me)
     
     	returns Boolean from Standard
 	is redefined;

src/BRepTopAdaptor/BRepTopAdaptor_Tool.cdl

@@ -47,13 +47,13 @@ is
   ---- 
 
   GetTopolTool(me: in out) 
-     returns mutable TopolTool from BRepTopAdaptor;
+     returns TopolTool from BRepTopAdaptor;
      
   SetTopolTool(me: in out ; 
                TT: TopolTool from BRepTopAdaptor);
 	
   GetSurface(me: in out)
-    returns mutable HSurface from Adaptor3d;
+    returns HSurface from Adaptor3d;
     
 	
   ---

src/BRepTopAdaptor/BRepTopAdaptor_TopolTool.cdl

@@ -39,12 +39,12 @@ is
 
     Create
     
-    	returns mutable TopolTool from BRepTopAdaptor;
+    	returns TopolTool from BRepTopAdaptor;
 
 
     Create(Surface: HSurface from Adaptor3d)
     
-    	returns mutable TopolTool from BRepTopAdaptor;
+    	returns TopolTool from BRepTopAdaptor;
 
     Initialize(me: mutable)
     is redefined;
@@ -74,7 +74,7 @@ is
 
     Value(me: mutable)
     
-    	returns mutable HCurve2d from Adaptor2d
+    	returns HCurve2d from Adaptor2d
         raises DomainError from Standard
 	is redefined;
 	
@@ -104,7 +104,7 @@ is
 
     Vertex(me: mutable)
     
-    	returns mutable HVertex from Adaptor3d
+    	returns HVertex from Adaptor3d
 	raises DomainError from Standard
 	is redefined;