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/PBRep/PBRep_Curve3D.cdl

@@ -29,7 +29,7 @@ is
     	   CF : Real     from Standard;
 	   CL : Real     from Standard;
     	   L  : Location from PTopLoc) 
-    returns mutable Curve3D from PBRep;
+    returns Curve3D from PBRep;
     	---Purpose : CF is curve first param
     	--           CL is curve last param
     	--           As far as they can't be computed from a Persistent Curve

src/PBRep/PBRep_CurveOn2Surfaces.cdl

@@ -31,7 +31,7 @@ is
     Create(S1 , S2  : Surface  from PGeom;
 	   L1 , L2  : Location from PTopLoc;
 	   C        : Shape    from GeomAbs)
-    returns mutable CurveOn2Surfaces from PBRep;
+    returns CurveOn2Surfaces from PBRep;
 
     Surface(me) returns any Surface from PGeom
     is static;

src/PBRep/PBRep_CurveOnClosedSurface.cdl

@@ -37,7 +37,7 @@ is
     	   S        : Surface  from PGeom;
 	   L        : Location from PTopLoc;
 	   C        : Shape    from GeomAbs)
-    returns mutable CurveOnClosedSurface from PBRep;
+    returns CurveOnClosedSurface from PBRep;
     	---Purpose: CF is curve first parameter
     	--          CL is curve last parameter
     	--          The two curves are SameParameter.

src/PBRep/PBRep_CurveOnSurface.cdl

@@ -32,7 +32,7 @@ is
 	   CL : Real     from Standard;
     	   S  : Surface  from PGeom; 
     	   L  : Location from PTopLoc)
-    returns mutable CurveOnSurface from PBRep;
+    returns CurveOnSurface from PBRep;
     	---Purpose: CF is curve first parameter
     	--          CL is curve last parameter
     	--          As far as they can't be computed from a Persistent Curve

src/PBRep/PBRep_PointOnCurve.cdl

@@ -24,7 +24,7 @@ is
     Create(P : Real;
     	   C : Curve    from PGeom;
 	   L : Location from PTopLoc)
-    returns mutable PointOnCurve from PBRep;
+    returns PointOnCurve from PBRep;
     	---Level: Internal 
     
 

src/PBRep/PBRep_PointOnCurveOnSurface.cdl

@@ -28,7 +28,7 @@ is
     	   C : Curve from PGeom2d;
 	   S : Surface from PGeom;
 	   L : Location from PTopLoc)
-    returns mutable PointOnCurveOnSurface from PBRep;
+    returns PointOnCurveOnSurface from PBRep;
     	---Level: Internal 
     
     PCurve(me) returns Curve from PGeom2d

src/PBRep/PBRep_PointOnSurface.cdl

@@ -25,7 +25,7 @@ is
     Create(P1,P2 : Real;
     	   S : Surface from PGeom;
 	   L : Location from PTopLoc)
-    returns mutable PointOnSurface from PBRep;
+    returns PointOnSurface from PBRep;
     	---Level: Internal 
     
     Parameter2(me) returns Real

src/PBRep/PBRep_Polygon3D.cdl

@@ -28,7 +28,7 @@ is
     Create(P: Polygon3D from PPoly;
     	   L: Location  from PTopLoc) 
     	---Purpose:
-    returns mutable Polygon3D from PBRep;
+    returns Polygon3D from PBRep;
         
     IsPolygon3D(me) returns Boolean
     	---Purpose: Returns True.

src/PBRep/PBRep_PolygonOnClosedSurface.cdl

@@ -32,7 +32,7 @@ is
     	   P2: Polygon2D from PPoly;
     	   S:  Surface   from PGeom;
 	   L:  Location  from PTopLoc)
-    returns mutable PolygonOnClosedSurface from PBRep;
+    returns PolygonOnClosedSurface from PBRep;
     
     IsPolygonOnClosedSurface(me) returns Boolean
     	---Purpose: returns True.

src/PBRep/PBRep_PolygonOnClosedTriangulation.cdl

@@ -33,7 +33,7 @@ is
     Create(P1, P2   : PolygonOnTriangulation from PPoly;
     	   S        : Triangulation    from PPoly;
 	   L        : Location         from PTopLoc)
-    returns mutable PolygonOnClosedTriangulation from PBRep;
+    returns PolygonOnClosedTriangulation from PBRep;
 
 
     IsPolygonOnClosedTriangulation(me)    returns Boolean

src/PBRep/PBRep_PolygonOnSurface.cdl

@@ -30,7 +30,7 @@ is
     Create(P: Polygon2D from PPoly;
     	   S: Surface   from PGeom;
 	   L: Location  from PTopLoc)
-    returns mutable PolygonOnSurface from PBRep;
+    returns PolygonOnSurface from PBRep;
 
 
     IsPolygonOnSurface(me)  returns Boolean

src/PBRep/PBRep_PolygonOnTriangulation.cdl

@@ -30,7 +30,7 @@ is
     Create(P: PolygonOnTriangulation from PPoly;
     	   T: Triangulation          from PPoly;
 	   L: Location               from PTopLoc)
-    returns mutable PolygonOnTriangulation from PBRep;
+    returns PolygonOnTriangulation from PBRep;
     
     
     IsPolygonOnTriangulation(me) returns Boolean

src/PBRep/PBRep_TEdge.cdl

@@ -32,7 +32,7 @@ uses
     CurveRepresentation       from PBRep
 
 is
-    Create returns mutable TEdge from PBRep;
+    Create returns TEdge from PBRep;
 	---Purpose: Creates an empty TEdge.
     	---Level: Internal 
 

src/PBRep/PBRep_TEdge1.cdl

@@ -32,7 +32,7 @@ uses
     CurveRepresentation       from PBRep
 
 is
-    Create returns mutable TEdge1 from PBRep;
+    Create returns TEdge1 from PBRep;
 	---Purpose: Creates an empty TEdge1.
     	---Level: Internal 
 

src/PBRep/PBRep_TFace.cdl

@@ -32,7 +32,7 @@ uses
     
 is
 
-    Create returns mutable TFace from PBRep;
+    Create returns TFace from PBRep;
 	---Purpose: Creates an empty TFace.
     	---Level: Internal 
 	

src/PBRep/PBRep_TFace1.cdl

@@ -32,7 +32,7 @@ uses
     
 is
 
-    Create returns mutable TFace1 from PBRep;
+    Create returns TFace1 from PBRep;
 	---Purpose: Creates an empty TFace1.
     	---Level: Internal 
 	

src/PBRep/PBRep_TVertex.cdl

@@ -26,7 +26,7 @@ uses
     PointRepresentation from PBRep
 
 is
-    Create returns mutable TVertex from PBRep;
+    Create returns TVertex from PBRep;
     	---Level: Internal 
 
     

src/PBRep/PBRep_TVertex1.cdl

@@ -26,7 +26,7 @@ uses
     PointRepresentation from PBRep
 
 is
-    Create returns mutable TVertex1 from PBRep;
+    Create returns TVertex1 from PBRep;
     	---Level: Internal