Remove automatic active-profiles logic

This mostly reverts 6155484.

Unfortunately, for multi-module projects, this logic ends up displaying
the active profiles for each project in the reactor, for every module
that builds. So you end up with N^2 messages about active profiles.

If you want to see the active profiles for your multi-module (or
single-module) project, all you have to do is prepend the goal; e.g.:

  mvn help:active-profiles clean install

Author: ctrueden

pom.xml

@@ -456,15 +456,6 @@
 				<plugin>
 					<artifactId>maven-help-plugin</artifactId>
 					<version>${maven-help-plugin.version}</version>
-					<executions>
-						<execution>
-							<id>show-active-profiles</id>
-							<phase>validate</phase>
-							<goals>
-								<goal>active-profiles</goal>
-							</goals>
-						</execution>
-					</executions>
 				</plugin>
 
 				<plugin>
@@ -1044,10 +1035,6 @@
 				<artifactId>maven-failsafe-plugin</artifactId>
 			</plugin>
 
-			<plugin>
-				<artifactId>maven-help-plugin</artifactId>
-			</plugin>
-
 			<!-- Create -sources.jar when building. -->
 			<plugin>
 				<artifactId>maven-source-plugin</artifactId>