Make some cosmetic tweaks to the uberjar config

Author: ctrueden

pom.xml

@@ -139,9 +139,7 @@
 		-->
 		<automatic-module-name>${package-name}</automatic-module-name>
 
-		<!--
-		Name of the uberjar generated by the uberjar profile.
-		-->
+		<!-- Classifier of the artifact generated by the uberjar profile. -->
 		<uberjar-classifier>all</uberjar-classifier>
 
 		<!--
@@ -1466,7 +1464,6 @@
 			<build>
 				<plugins>
 					<plugin>
-						<groupId>org.apache.maven.plugins</groupId>
 						<artifactId>maven-shade-plugin</artifactId>
 						<executions>
 							<execution>