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/TPrsStd/TPrsStd_AISPresentation.cdl

@@ -70,7 +70,7 @@ is
     ---Category: Presentation attribute implementation
     --          ======================================
     
-    Create returns mutable AISPresentation from TPrsStd;
+    Create returns AISPresentation from TPrsStd;
     
     SetDisplayed(me : mutable; B : Boolean from Standard);
     
@@ -179,14 +179,14 @@ is
     ---C++: return const &
 
     NewEmpty(me)
-    returns mutable Attribute from TDF;    
+    returns Attribute from TDF;    
  
     Restore(me: mutable; with : Attribute from TDF);
 
-    Paste (me; into : mutable Attribute from TDF;
-	       RT   : mutable RelocationTable from TDF);     
+    Paste (me; into : Attribute from TDF;
+	       RT   : RelocationTable from TDF);     
 
-    BackupCopy(me) returns mutable Attribute from TDF is redefined;
+    BackupCopy(me) returns Attribute from TDF is redefined;
     
     ---Category: Callbacks for viewer updating
     --           =============================

src/TPrsStd/TPrsStd_AISViewer.cdl

@@ -72,7 +72,7 @@ is
     --          =================
 
     Create
-    returns mutable AISViewer from TPrsStd; 
+    returns AISViewer from TPrsStd; 
     
     Update (me);
 ---Purpose: Updates the viewer at the label access.
@@ -94,10 +94,10 @@ is
     Restore(me: mutable; with : Attribute from TDF);
     
     NewEmpty(me)
-    returns mutable Attribute from TDF;
+    returns Attribute from TDF;
     
-    Paste (me; into : mutable Attribute from TDF;
-	       RT   : mutable RelocationTable from TDF); 
+    Paste (me; into : Attribute from TDF;
+	       RT   : RelocationTable from TDF); 
 	       
 fields
 

src/TPrsStd/TPrsStd_AxisDriver.cdl

@@ -24,7 +24,7 @@ uses
 is
 
     Create
-    returns mutable AxisDriver from TPrsStd;
+    returns AxisDriver from TPrsStd;
 ---Purpose: Constructs an empty axis driver.
     
     Update (me : mutable ;

src/TPrsStd/TPrsStd_ConstraintDriver.cdl

@@ -24,7 +24,7 @@ uses
 is
 
     Create
-    returns mutable ConstraintDriver from TPrsStd;
+    returns ConstraintDriver from TPrsStd;
 ---Purpose: Constructs an empty constraint driver.
     Update (me : mutable ;
            aLabel      : Label from TDF;

src/TPrsStd/TPrsStd_DriverTable.cdl

@@ -32,11 +32,11 @@ uses Boolean    from Standard,
 
 is
 
-    Get (myclass) returns mutable DriverTable from TPrsStd;
+    Get (myclass) returns DriverTable from TPrsStd;
     ---Purpose: Returns the static table.
     --          If it does not exist, creates it and fills it with standard drivers.
 
-    Create returns mutable DriverTable from TPrsStd;
+    Create returns DriverTable from TPrsStd;
     ---Purpose: Default constructor
 
     InitStandardDrivers (me : mutable);

src/TPrsStd/TPrsStd_GeometryDriver.cdl

@@ -25,7 +25,7 @@ uses
 is
 
     Create
-    returns mutable GeometryDriver from TPrsStd;
+    returns GeometryDriver from TPrsStd;
 ---Purpose: Constructs an empty geometry driver.    
     Update (me : mutable ;
            aLabel      : Label from TDF;

src/TPrsStd/TPrsStd_NamedShapeDriver.cdl

@@ -24,7 +24,7 @@ uses
 is
 
     Create
-    returns mutable NamedShapeDriver from TPrsStd;
+    returns NamedShapeDriver from TPrsStd;
 ---Purpose: Constructs an empty named shape driver.
     Update (me : mutable ;
            aLabel      : Label from TDF;

src/TPrsStd/TPrsStd_PlaneDriver.cdl

@@ -24,7 +24,7 @@ uses
 is
 
     Create
-    returns mutable PlaneDriver from TPrsStd;
+    returns PlaneDriver from TPrsStd;
 ---Purpose: Constructs an empty plane driver.
     Update (me : mutable ;
            aLabel      : Label from TDF;

src/TPrsStd/TPrsStd_PointDriver.cdl

@@ -24,7 +24,7 @@ uses
 is
 
     Create
-    returns mutable PointDriver from TPrsStd;
+    returns PointDriver from TPrsStd;
 ---Purpose: Constructs an empty point driver.
     Update (me : mutable ;
            aLabel      : Label from TDF;