Hi,
Fresh install of 1.1.8 throws a perl error when attempting to remove an interface from a bridge-group. The interface is removed from the bridge, but the configuration isn't changed to reflect this, resulting in the interface being re-added at next reboot
```
vyos@vyos:~$ show bridge
bridge name bridge id STP enabled interfaces
br0 0000.128a38ead978 no eth1
vyos@vyos:~$ configure
[edit]
vyos@vyos# delete interfaces ethernet eth1 bridge-group bridge br0
[edit]
vyos@vyos# commit
[ interfaces ethernet eth1 bridge-group ]
Use of uninitialized value $newbridge in string ne at /opt/vyatta/sbin/vyatta-bridge.pl line 88.
Use of uninitialized value $newbridge in concatenation (.) or string at /opt/vyatta/sbin/vyatta-bridge.pl line 89.
Moving interface eth1 from br0 to
Use of uninitialized value $bridge in concatenation (.) or string at /opt/vyatta/sbin/vyatta-bridge.pl line 98.
Incorrect number of arguments for command
Usage: brctl addif <bridge> <device> add interface to bridge
[[interfaces ethernet eth1]] failed
Commit failed
```
Steps to reproduce:
1) Create a bridge, brX, and add ethY to it
2) Commit, save, and exit from configure mode
3) Attempt to remove ethY from brX
See attached files for detailed output:
{F31044}
{F31040}
EDIT - sanitized show tech-support output, not enough coffee this morning