Fix MDCHandler unused import (#1814)

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

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

@@ -9,7 +9,6 @@
  */
 package org.eclipse.hawkbit.security;
 
-import ch.qos.logback.classic.turbo.MDCFilter;
 import jakarta.servlet.FilterChain;
 import jakarta.servlet.ServletException;
 import jakarta.servlet.http.HttpServletRequest;
@@ -162,4 +161,4 @@ public class MDCHandler {
             }, AuthorizationFilter.class);
         }
     }
-}
+}