Remove anonymous controller support (#2285)

It's not usable feature, and is error prone - someone could left anonymous enabled by mistake

Signed-off-by: Avgustin Marinov <Avgustin.Marinov@bosch.com>

hawkbit-security/hawkbit-security-core/src/main/java/org/eclipse/hawkbit/security/DdiSecurityProperties.java

@@ -67,7 +67,6 @@ public class DdiSecurityProperties {
     @Data
     public static class Authentication {
 
-        private final Anonymous anonymous = new Anonymous();
         private final Targettoken targettoken = new Targettoken();
         private final Gatewaytoken gatewaytoken = new Gatewaytoken();
 
@@ -105,17 +104,5 @@ public class DdiSecurityProperties {
             @ToString.Exclude
             private String key = "";
         }
-
-        /**
-         * Anonymous authentication.
-         */
-        @Data
-        public static class Anonymous {
-
-            /**
-             * Set to true to enable anonymous DDI client authentication.
-             */
-            private boolean enabled = false;
-        }
     }
 }