FWSM Default port channel?

Question

I'm doing some L2 cleanups across mutliple 6509E environments and I've found something consistent that I can't find in documentation.
On all my pairs of 6509s where I have FWSMs bundled (6509-A has FWSM-1 is Slot 1 and 6509-B has FWSM-2 in Slot 1) I also have a port channel 305. Obviously when I do a "show run" or "show int desc" I don't see anything in slot one. It's a service module. But the port channel is referencing ports 1/1-6. And it's all in service/up. I was about to delete this as I thought it was some leftover config (TEST 6509s) until I went and saw the same things on our PROD 6509s. Can anyone explain this or provide some documentation on it? Is it cosmetic? Necessary? Can I delete it as part of my audit cleanup? Don't want to mess with it even in TEST without some information. Nothing on google that's clear and I can't find anything on CCO.
6509-1#sho etherch 305 summ
Flags:  D - down        P - bundled in port-channel
        I - stand-alone s - suspended
        H - Hot-standby (LACP only)
        R - Layer3      S - Layer2
        U - in use      N - not in use, no aggregation
        f - failed to allocate aggregator
        M - not in use, no aggregation due to minimum links not met
        m - not in use, port not aggregated due to minimum links not met
        u - unsuitable for bundling
        d - default port
        w - waiting to be aggregated
Number of channel-groups in use: 11
Number of aggregators:           11
Group  Port-channel  Protocol    Ports
------+-------------+-----------+-----------------------------------------------
305    Po305(SU)        -        Gi1/1(P)       Gi1/2(P)       Gi1/3(P)      
                                 Gi1/4(P)       Gi1/5(P)       Gi1/6(P)      
Last applied Hash Distribution Algorithm:   -
6509-1#sho etherch 305 det 
Group state = L2
Ports: 6   Maxports = 8
Port-channels: 1 Max Port-channels = 1
Protocol:    -
Minimum Links: 0
                Ports in the group:
Port: Gi1/1
Port state    = Up Mstr In-Bndl
Channel group = 305         Mode = On      Gcchange = -
Port-channel  = Po305       GC   =   -         Pseudo port-channel = Po305
Port index    = 0           Load = 0x41        Protocol =    -
Age of the port in the current state: 46d:06h:53m:39s
Port: Gi1/2
Port state    = Up Mstr In-Bndl
Channel group = 305         Mode = On      Gcchange = -
Port-channel  = Po305       GC   =   -         Pseudo port-channel = Po305
Port index    = 1           Load = 0x02        Protocol =    -
Age of the port in the current state: 46d:06h:53m:39s
Port: Gi1/3
Port state    = Up Mstr In-Bndl
Channel group = 305         Mode = On      Gcchange = -
Port-channel  = Po305       GC   =   -         Pseudo port-channel = Po305
Port index    = 2           Load = 0x04        Protocol =    -
Age of the port in the current state: 46d:06h:53m:41s
Port: Gi1/4
Port state    = Up Mstr In-Bndl
Channel group = 305         Mode = On      Gcchange = -
Port-channel  = Po305       GC   =   -         Pseudo port-channel = Po305
Port index    = 3           Load = 0x88        Protocol =    -
Age of the port in the current state: 46d:06h:53m:41s
Port: Gi1/5
Port state    = Up Mstr In-Bndl
Channel group = 305         Mode = On      Gcchange = -
Port-channel  = Po305       GC   =   -         Pseudo port-channel = Po305
Port index    = 4           Load = 0x10        Protocol =    -
Age of the port in the current state: 46d:06h:53m:41s
Port: Gi1/6
Port state    = Up Mstr In-Bndl
Channel group = 305         Mode = On      Gcchange = -
Port-channel  = Po305       GC   =   -         Pseudo port-channel = Po305
Port index    = 5           Load = 0x20        Protocol =    -
Age of the port in the current state: 46d:06h:53m:41s
                Port-channels in the group:
Port-channel: Po305
Age of the Port-channel   = 46d:06h:55m:56s
Logical slot/port   = 14/11          Number of ports = 6
GC                  = 0x00000000      HotStandBy port = null
Port state          = Port-channel Ag-Inuse
Protocol            =    -
Fast-switchover     = disabled
Load share deferral = disabled  
Ports in the Port-channel:
Index   Load   Port     EC state        No of bits
------+------+------+------------------+-----------
  0     41     Gi1/1    On    2
  1     02     Gi1/2    On    1
  2     04     Gi1/3    On    1
  3     88     Gi1/4    On    2
  4     10     Gi1/5    On    1
  5     20     Gi1/6    On    1
Time since last port bundled:    46d:06h:53m:41s    Gi1/6
Last applied Hash Distribution Algorithm:   -
NOC-SW-ITEST-AGG1#

Answer 1

The connection between the FWSM and the switch is a 6-GB 802.1Q trunking EtherChannel. This EtherChannel is automatically created when you install the FWSM.
http://cisconetwork.org.ua/1587051893/ch04lev1sec1.html
http://www.cisco.com/en/US/docs/security/fwsm/fwsm23/configuration/guide/switch.pdf
Thanks
Ajay