Revert "Utilize VT if possible (#381)"

This reverts commit 6f0ad55.

Author: slachiewicz

pom.xml

@@ -182,42 +182,4 @@
     </plugins>
   </build>
 
-  <profiles>
-    <profile>
-      <id>jdk21</id>
-      <activation>
-        <jdk>[21,)</jdk>
-      </activation>
-      <build>
-        <plugins>
-          <plugin>
-            <groupId>org.apache.maven.plugins</groupId>
-            <artifactId>maven-compiler-plugin</artifactId>
-            <executions>
-              <execution>
-                <id>java21</id>
-                <goals>
-                  <goal>compile</goal>
-                </goals>
-                <phase>compile</phase>
-                <configuration>
-                  <release>21</release>
-                  <compileSourceRoots>
-                    <compileSourceRoot>${project.basedir}/src/main/java21</compileSourceRoot>
-                  </compileSourceRoots>
-                  <multiReleaseOutput>true</multiReleaseOutput>
-                </configuration>
-              </execution>
-            </executions>
-          </plugin>
-        </plugins>
-      </build>
-    </profile>
-    <profile>
-      <id>plexus-release</id>
-      <properties>
-        <minimalJavaBuildVersion>21</minimalJavaBuildVersion>
-      </properties>
-    </profile>
-  </profiles>
 </project>

src/main/java/org/codehaus/plexus/archiver/zip/ConcurrentJarCreator.java

@@ -23,6 +23,7 @@
 import java.io.SequenceInputStream;
 import java.io.UncheckedIOException;
 import java.util.concurrent.ExecutionException;
+import java.util.concurrent.Executors;
 import java.util.zip.Deflater;
 import java.util.zip.ZipEntry;
 
@@ -117,8 +118,8 @@ public ConcurrentJarCreator(boolean compressAddedZips, int nThreads) throws IOEx
         manifest = createDeferred(defaultSupplier);
         directories = createDeferred(defaultSupplier);
         synchronousEntries = createDeferred(defaultSupplier);
-        parallelScatterZipCreator = new ParallelScatterZipCreator(
-                ConcurrentJarCreatorExecutorServiceFactory.createExecutorService(nThreads), defaultSupplier);
+        parallelScatterZipCreator =
+                new ParallelScatterZipCreator(Executors.newFixedThreadPool(nThreads), defaultSupplier);
     }
 
     /**