Fix copy-paste error from recent change

See gh-35562

spring-web/src/main/java/org/springframework/http/codec/support/BaseDefaultCodecs.java

@@ -846,7 +846,6 @@ class BaseDefaultCodecs implements CodecConfigurer.DefaultCodecs, CodecConfigure
 			else {
 				throw new IllegalStateException("Jackson not present");
 			}
-			this.jacksonJsonEncoder = new JacksonJsonEncoder();
 		}
 		return this.jacksonJsonEncoder;
 	}