Polish logging in OAuth2ClientAuthenticationFilter

Closes gh-2025

Author: jgrandja

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/server/authorization/web/OAuth2ClientAuthenticationFilter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2020-2024 the original author or authors.
+ * Copyright 2020-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -192,10 +192,6 @@ private void onAuthenticationSuccess(HttpServletRequest request, HttpServletResp
 		SecurityContext securityContext = SecurityContextHolder.createEmptyContext();
 		securityContext.setAuthentication(authentication);
 		SecurityContextHolder.setContext(securityContext);
-		if (this.logger.isDebugEnabled()) {
-			this.logger.debug(LogMessage.format("Set SecurityContextHolder authentication to %s",
-					authentication.getClass().getSimpleName()));
-		}
 	}
 
 	private void onAuthenticationFailure(HttpServletRequest request, HttpServletResponse response,