Disabling menu entry for adding "Python" F-Modifier.

This hasn't been coded yet, and I don't think I'll be adding it very soon yet, so disabling to avoid further confusion over this.

source/blender/makesrna/intern/rna_fcurve.c

@@ -53,7 +53,7 @@ EnumPropertyItem fmodifier_type_items[] = {
 	{FMODIFIER_TYPE_CYCLES, "CYCLES", 0, "Cycles", ""},
 	{FMODIFIER_TYPE_NOISE, "NOISE", 0, "Noise", ""},
 	{FMODIFIER_TYPE_FILTER, "FILTER", 0, "Filter", ""},
-	{FMODIFIER_TYPE_PYTHON, "PYTHON", 0, "Python", ""},
+	//{FMODIFIER_TYPE_PYTHON, "PYTHON", 0, "Python", ""},	// FIXME: not implemented yet!
 	{FMODIFIER_TYPE_LIMITS, "LIMITS", 0, "Limits", ""},
 	{FMODIFIER_TYPE_STEPPED, "STEPPED", 0, "Stepped Interpolation", ""},
 	{0, NULL, 0, NULL, NULL}};