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/IGESControl/IGESControl_ActorWrite.cdl

@@ -34,7 +34,7 @@ is
     ---Purpose : Recognizes a ShapeMapper
 
     Transfer  (me : mutable; start : Finder from Transfer;
-    	       FP : mutable FinderProcess)  returns Binder  is redefined;
+    	       FP : FinderProcess)  returns Binder  is redefined;
     ---Purpose : Transfers Shape to IGES Entities
     --         
     --           ModeTrans may be : 0 -> groups of Faces

src/IGESControl/IGESControl_AlgoContainer.cdl

@@ -19,7 +19,7 @@ class AlgoContainer from IGESControl inherits AlgoContainer from IGESToBRep
 
 is
 
-    Create returns mutable AlgoContainer from IGESControl;
+    Create returns AlgoContainer from IGESControl;
     	---Purpose: Empty constructor
 
 end AlgoContainer;

src/IGESControl/IGESControl_Controller.cdl

@@ -34,24 +34,24 @@ uses
 is
 
     Create (modefnes : Boolean = Standard_False)
-    	returns mutable Controller from IGESControl;
+    	returns Controller from IGESControl;
     ---Purpose : Initializes the use of IGES Norm (the first time) and returns
     --           a Controller for IGES-5.1
     --           If <modefnes> is True, sets it to internal FNES format
 
-    NewModel     (me) returns mutable InterfaceModel from Interface;
+    NewModel     (me) returns InterfaceModel from Interface;
     ---Purpose : Creates a new empty Model ready to receive data of the Norm.
     --           It is taken from IGES Template Model
 
     ActorRead    (me; model : InterfaceModel)
-                 returns mutable ActorOfTransientProcess from Transfer;
+                 returns ActorOfTransientProcess from Transfer;
     ---Purpose : Returns the Actor for Read attached to the pair (norm,appli)
     --           It is an Actor from IGESToBRep, adapted from an IGESModel :
     --           Unit, tolerances
 
     TransferWriteShape (me; shape : Shape from TopoDS;
-    	    	    	FP        : mutable FinderProcess  from Transfer;
-    	    	        model     : mutable InterfaceModel from Interface;
+    	    	    	FP        : FinderProcess  from Transfer;
+    	    	        model     : InterfaceModel from Interface;
 			modetrans : Integer = 0)
       returns ReturnStatus  is redefined;
     ---Purpose : Takes one Shape and transfers it to the InterfaceModel

src/IGESControl/IGESControl_IGESBoundary.cdl

@@ -29,10 +29,10 @@ uses
 
 is
 
-    Create returns mutable IGESBoundary from IGESControl;
+    Create returns IGESBoundary from IGESControl;
     	---Purpose: Creates an object and calls inherited constuctor.
 
-    Create (CS: CurveAndSurface from IGESToBRep) returns mutable IGESBoundary from IGESControl;
+    Create (CS: CurveAndSurface from IGESToBRep) returns IGESBoundary from IGESControl;
     	---Purpose: Creates an object and calls inherited constuctor.
 	
     Check (me: mutable; result, checkclosure, okCurve3d, okCurve2d: Boolean) is redefined;

src/IGESControl/IGESControl_Reader.cdl

@@ -66,7 +66,7 @@ is
     Create returns Reader from IGESControl;
     ---Purpose : Creates a Reader from scratch
 
-    Create (WS : mutable WorkSession from XSControl;
+    Create (WS : WorkSession from XSControl;
     	    	 scratch : Boolean = Standard_True)
     	returns Reader from IGESControl;
     ---Purpose : Creates a Reader from an already existing Session

src/IGESControl/IGESControl_ToolContainer.cdl

@@ -23,7 +23,7 @@ uses
     
 is
 
-    Create returns mutable ToolContainer from IGESControl;
+    Create returns ToolContainer from IGESControl;
     	---Purpose: Empty constructor
 	
     IGESBoundary (me) returns IGESBoundary from IGESToBRep is redefined;

src/IGESControl/IGESControl_Writer.cdl

@@ -47,7 +47,7 @@ is
     	-- - 0: Faces (default)
     	-- - 1: BRep.
 
-    Create (model : mutable IGESModel; modecr : Integer = 0) returns Writer;
+    Create (model : IGESModel; modecr : Integer = 0) returns Writer;
     	---Purpose : Creates a writer object with the
     	-- prepared IGES model model in write mode.
     	-- modecr defines the write mode and may be:
@@ -57,8 +57,8 @@ is
     Model (me) returns IGESModel;
     	---Purpose : Returns the IGES model to be written in output.
 
-    TransferProcess    (me) returns mutable FinderProcess;
-    SetTransferProcess (me : in out; TP : mutable FinderProcess);
+    TransferProcess    (me) returns FinderProcess;
+    SetTransferProcess (me : in out; TP : FinderProcess);
     	---Purpose : Returns/Sets the TransferProcess : it contains final results
     	--           and if some, check messages