api/swagger: remove logentries

The service was discontinued on November 15, 2022, so
remove mentions of this driver in the API docs.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

api/swagger.yaml

@@ -3022,8 +3022,6 @@ definitions:
             Name: "journald"
           - Type: "Log"
             Name: "json-file"
-          - Type: "Log"
-            Name: "logentries"
           - Type: "Log"
             Name: "splunk"
           - Type: "Log"
@@ -5417,7 +5415,7 @@ definitions:
         type: "array"
         items:
           type: "string"
-        example: ["awslogs", "fluentd", "gcplogs", "gelf", "journald", "json-file", "logentries", "splunk", "syslog"]
+        example: ["awslogs", "fluentd", "gcplogs", "gelf", "journald", "json-file", "splunk", "syslog"]
 
 
   RegistryServiceConfig: