Revert "udev: re-read the discovery log page when a discovery controller reconnected"

Revert "udev: re-read the discovery log page when a discovery controller reconnected"

This reverts commit f86faaaa2a1ff319bde188dc8988be1ec054d238.

Observing unwanted side-effects with nvme discovery. For e.g., running
a simple 'nvme discover' command ends up invoking connect-all as well,
creating namespaces on the host.

One can also see spurious discovery controllers in the 'nvme
list-subsys' output, despite having not created any persistent
discovery controllers at all.

Reported-by: Martin George <Martin.George@netapp.com>
Signed-off-by: Daniel Wagner <dwagner@suse.de>