Fix warning.
Fix warning.

The compiler plugin version is already defined in the plugin management
section.
GFriedrich/logging-log4j2,apache/logging-log4j2,codescale/logging-log4j2,GFriedrich/logging-log4j2,apache/logging-log4j2,xnslong/logging-log4j2,xnslong/logging-log4j2,GFriedrich/logging-log4j2,codescale/logging-log4j2,codescale/logging-log4j2,apache/logging-log4j2,xnslong/logging-log4j2