maven-wrapper.jar can be removed from the source

see: https://github.com/takari/maven-wrapper#usage-without-binary-jar

Maven.gitignore

@@ -7,6 +7,3 @@ release.properties
 dependency-reduced-pom.xml
 buildNumber.properties
 .mvn/timing.properties
-
-# Avoid ignoring Maven wrapper jar file (.jar files are usually ignored)
-!/.mvn/wrapper/maven-wrapper.jar