No longer need to mkdir lib for CI

1 job for master in 2 minutes and 37 seconds (queued for 2 minutes and 36 seconds)
Status Name Job ID Coverage
  Test
failed test #17741

00:02:37

 
Name Stage Failure
failed
test Test
    [junit] 	at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
[junit] at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
[junit]

BUILD FAILED
/builds/tpo/metrics/collector/src/build/java/base.xml:189: Test org.torproject.metrics.collector.downloader.DownloaderTest failed

Total time: 22 seconds
ERROR: Job failed: exit code 1