Remove unused imapserver getdelim()

imapserver.getdelim() was not used at all, so remove this function. The
folder delimiter is available via the repository.getsep() call.

Signed-off-by: Sebastian Spaeth <Sebastian@SSpaeth.de>

offlineimap/imapserver.py

@@ -47,7 +47,11 @@ class IMAPServer:
     """Initializes all variables from an IMAPRepository() instance
 
     Various functions, such as acquireconnection() return an IMAP4
-    object on which we can operate."""
+    object on which we can operate.
+
+    Public instance variables are: self.:
+     delim The server's folder delimiter. Only valid after acquireconnection()
+     """
     GSS_STATE_STEP = 0
     GSS_STATE_WRAP = 1
     def __init__(self, repos):
@@ -98,11 +102,6 @@ class IMAPServer:
         self.passworderror = None
         return self.password
 
-    def getdelim(self):
-        """Returns this server's folder delimiter.  Can only be called
-        after one or more calls to acquireconnection."""
-        return self.delim
-
     def getroot(self):
         """Returns this server's folder root.  Can only be called after one
         or more calls to acquireconnection."""