Remove obsolete comments in POM mentioning GitHub Packages

Signed-off-by: Alexander Kriegisch <Alexander@Kriegisch.name>

lib/pom.xml

@@ -184,7 +184,6 @@
                   <artifactItems>
 
                     <artifactItem>
-                      <!-- Available from GitHub Packages (needs special repository declaration) -->
                       <groupId>org.aspectj</groupId>
                       <artifactId>org.eclipse.jdt.core</artifactId>
                       <version>${jdt.core.version}</version>
@@ -194,7 +193,6 @@
                       <destFileName>jdtcore-for-aspectj.jar</destFileName>
                     </artifactItem>
                     <artifactItem>
-                      <!-- Available from GitHub Packages (needs special repository declaration) -->
                       <groupId>org.aspectj</groupId>
                       <artifactId>org.eclipse.jdt.core</artifactId>
                       <version>${jdt.core.version}</version>