Honour rule 'do not modify what user input'

fromText was used to parse and store in different placeholders slices of coordinate strings.
This assumption is wrong. Parsing will be dedicated to asText renderer.

product/ERP5/interfaces/coordinate.py

@@ -46,14 +46,6 @@ class ICoordinate(Interface):
     """
     pass
 
-  def fromText(coordinate_text):
-    """
-      modifies the coordinate according to the input text.
-    This method usually tries to lookup a skin named ${PortalType}_fromText and
-    to use this script to modify the properties of this document.
-    """
-    pass
-
   def standardTextFormat():
     """
       returns a string which defines the standard