Remove deprecated community options

"Community" support

- has been removed from mautrix/facebook in v0.3.3:
  31cac6fb5e

- has been removed from mautrix/signal in v0.2.2:
  1f27a608a6

- will be removed in the next mautrix/instagram release:
  e2ae1ca503

- will be removed in the next mautrix/twitter release:
  3893075265

roles/matrix-bridge-mautrix-facebook/templates/config.yaml.j2

@@ -66,12 +66,6 @@ bridge:
     # Localpart template of MXIDs for Facebook users.
     # {userid} is replaced with the user ID of the Facebook user.
     username_template: "facebook_{userid}"
-    # Localpart template for per-user room grouping community IDs.
-    # The bridge will create these communities and add all of the specific user's portals to the community.
-    # {localpart} is the MXID localpart and {server} is the MXID server part of the user.
-    #
-    # `facebook_{localpart}={server}` is a good value.
-    community_template: null
     # Displayname template for Facebook users.
     # {displayname} is replaced with the display name of the Facebook user
     #               as defined below in displayname_preference.

roles/matrix-bridge-mautrix-instagram/templates/config.yaml.j2

@@ -46,12 +46,6 @@ appservice:
   bot_displayname: Instagram bridge bot
   bot_avatar: mxc://maunium.net/JxjlbZUlCPULEeHZSwleUXQv
 
-  # Community ID for bridged users (changes registration file) and rooms.
-  # Must be created manually.
-  #
-  # Example: "+instagram:example.com". Set to false to disable.
-  community_id: false
-
   # Whether or not to receive ephemeral events via appservice transactions.
   # Requires MSC2409 support (i.e. Synapse 1.22+).
   # You should disable bridge -> sync_with_custom_puppets when this is enabled.

roles/matrix-bridge-mautrix-signal/templates/config.yaml.j2

@@ -56,12 +56,6 @@ appservice:
     bot_displayname: Signal bridge bot
     bot_avatar: mxc://maunium.net/wPJgTQbZOtpBFmDNkiNEMDUp
 
-    # Community ID for bridged users (changes registration file) and rooms.
-    # Must be created manually.
-    #
-    # Example: "+signal:example.com". Set to false to disable.
-    community_id: false
-
     # Whether or not to receive ephemeral events via appservice transactions.
     # Requires MSC2409 support (i.e. Synapse 1.22+).
     # You should disable bridge -> sync_with_custom_puppets when this is enabled.

roles/matrix-bridge-mautrix-twitter/templates/config.yaml.j2

@@ -54,12 +54,6 @@ appservice:
     bot_displayname: Twitter bridge bot
     bot_avatar: mxc://maunium.net/HVHcnusJkQcpVcsVGZRELLCn
 
-    # Community ID for bridged users (changes registration file) and rooms.
-    # Must be created manually.
-    #
-    # Example: "+twitter:example.com". Set to false to disable.
-    community_id: false
-
     # Whether or not to receive ephemeral events via appservice transactions.
     # Requires MSC2409 support (i.e. Synapse 1.22+).
     # You should disable bridge -> sync_with_custom_puppets when this is enabled.