(fix) removed unused method

SoObjects/Mailer/SOGoMailAccount.h

@@ -75,7 +75,6 @@ typedef enum {
 
 /* capabilities */
 - (BOOL) hasCapability: (NSString *) capability;
-- (NSString *) imap4Separator;
 - (BOOL) supportsQuotas;
 - (BOOL) supportsQResync;
 

SoObjects/Mailer/SOGoMailAccount.m

@@ -257,18 +257,6 @@ static NSString *inboxFolderName = @"INBOX";
   return [capabilities containsObject: capability];
 }
 
-- (NSString *) imap4Separator
-{
-  NGImap4Client *imapClient;
-
-  imapClient = [[self imap4Connection] client];
-
-  if (![imapClient delimiter])
-    [imapClient list: @"INBOX"  pattern: @""];
-
-  return [imapClient delimiter];
-}
-
 - (BOOL) supportsQuotas
 {
   return [self hasCapability: @"quota"];