Remove Symbian support from bind enum documentation.

Symbian is no longer a supported platform.

Change-Id: Ifcb2e05661b16acc6307a4ccfaa42586750734c1
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Peter Hartmann <peter.hartmann@nokia.com>

src/network/socket/qabstractsocket.cpp

@@ -369,13 +369,6 @@
     This enum describes the different flags you can pass to modify the
     behavior of QAbstractSocket::bind().
 
-    \note On Symbian OS bind flags behaviour depends on process capabilties.
-    If process has NetworkControl capability, the bind attempt with
-    ReuseAddressHint will always succeed even if the address and port is already
-    bound by another socket with any flags. If process does not have
-    NetworkControl capability, the bind attempt to address and port already
-    bound by another socket will always fail.
-
     \value ShareAddress Allow other services to bind to the same address
     and port. This is useful when multiple processes share
     the load of a single service by listening to the same address and port