Make wxPG_FLOAT_PRECISION a built-in wxFloatProperty attribute

wxPG_FLOAT_PRECISION value is used only internally in wxFloatProperty and there is no need to make it readable via getter function.

include/wx/propgrid/props.h

@@ -280,7 +280,6 @@ public:
                                 const wxString& text,
                                 int argFlags = 0 ) const wxOVERRIDE;
     virtual bool DoSetAttribute( const wxString& name, wxVariant& value ) wxOVERRIDE;
-    virtual wxVariant DoGetAttribute( const wxString& name ) const wxOVERRIDE;
 
     virtual bool ValidateValue( wxVariant& value,
                                 wxPGValidationInfo& validationInfo ) const wxOVERRIDE;

interface/wx/propgrid/property.h

@@ -94,9 +94,9 @@ struct wxPGPaintData
 */
 #define wxPG_BOOL_USE_DOUBLE_CLICK_CYCLING  wxS("UseDClickCycling")
 
-/** wxFloatProperty (and similar) specific, int, default -1. Sets the (max) precision
-    used when floating point value is rendered as text. The default -1 means infinite
-    precision.
+/** wxFloatProperty (and similar) specific built-in attribute of type @c int.
+    Default value is -1. Sets the (max) precision used when floating point
+    value is rendered as text. The default -1 means infinite precision.
 */
 #define wxPG_FLOAT_PRECISION                wxS("Precision")
 

src/propgrid/props.cpp

@@ -1038,16 +1038,6 @@ bool wxFloatProperty::DoSetAttribute( const wxString& name, wxVariant& value )
     return false;
 }
 
-wxVariant wxFloatProperty::DoGetAttribute( const wxString& name ) const
-{
-    wxVariant value;
-    if ( name == wxPG_FLOAT_PRECISION )
-    {
-        value = (long)m_precision;
-    }
-    return value;
-}
-
 wxValidator*
 wxFloatProperty::GetClassValidator()
 {