Remove mattermost codes that were moved to teleport repo

access/mattermost/example_config.toml

@@ -0,0 +1,37 @@
+# example mattermost configuration TOML file
+[teleport]
+# Teleport Auth/Proxy Server address.
+#
+# Should be port 3025 for Auth Server and 3080 or 443 for Proxy.
+# For Teleport Cloud, should be in the form "your-account.teleport.sh:443".
+addr = "example.com:3025"
+
+# Credentials.
+#
+# When using --format=file:
+# identity = "/var/lib/teleport/plugins/mattermost/auth_id"    # Identity file
+#
+# When using --format=tls:
+# client_key = "/var/lib/teleport/plugins/mattermost/auth.key" # Teleport TLS secret key
+# client_crt = "/var/lib/teleport/plugins/mattermost/auth.crt" # Teleport TLS certificate
+# root_cas = "/var/lib/teleport/plugins/mattermost/auth.cas"   # Teleport CA certs
+
+[mattermost]
+url = "https://mattermost.example.com" # Mattermost Server URL
+token = "api-token"                    # Mattermost Bot OAuth token
+
+# Notify recipients (optional)
+#
+# The value is an array of strings, where each element is either:
+# - A channel name in the format 'team/channel', where / separates the 
+#   name of the team and the name of the channel
+# - The email address of a Mattermost user to notify via a direct message 
+#   when the plugin receives an Access Request event
+# recipients = [
+#   "my-team-name/channel-name",
+#   "first.last@example.com"
+# ]
+
+[log]
+output = "stderr" # Logger output. Could be "stdout", "stderr" or "/var/lib/teleport/mattermost.log"
+severity = "INFO" # Logger severity. Could be "INFO", "ERROR", "DEBUG" or "WARN".