Remove log4j notes since Eureka no longer requires it

docs/src/main/asciidoc/spring-cloud-netflix.adoc

@@ -248,31 +248,6 @@ springBoot {
 ----
 ====
 
-[NOTE]
-====
-The Eureka server is tied to log4j and doesn't work with logback, 
-so the dependency configuration
-has to be tweaked compared to a normal Spring Boot app. The 
-`spring-cloud-starter-eureka-server` does this for you, but if you
-add logback transitively through another dependency you will need to
-exclude it manually, e.g. in Maven
-
-.pom.xml
-[source,xml,indent=0]
-----
-		<dependency>
-			<groupId>org.springframework.boot</groupId>
-			<artifactId>spring-boot-starter-web</artifactId>
-			<exclusions>
-				<exclusion>
-					<artifactId>spring-boot-starter-logging</artifactId>
-					<groupId>org.springframework.boot</groupId>
-				</exclusion>
-			</exclusions>
-		</dependency>
-----
-====
-
 === High Availability, Zones and Regions
 
 The Eureka server does not have a backend store, but the service