DATAMONGO-1715 - Remove spring-data-mongodb-log4j module.

We no longer support spring-data-mongodb-log4j hence removing the code entirely.

Original pull request: spring-projects#471.

Author: christophstrobl

pom.xml

@@ -21,7 +21,6 @@
 	<modules>
 		<module>spring-data-mongodb</module>
 		<module>spring-data-mongodb-cross-store</module>
-		<module>spring-data-mongodb-log4j</module>
 		<module>spring-data-mongodb-distribution</module>
 	</modules>