Remove Ubuntu 16.04 from test matrix as ubuntu-latest is sufficient

bp-alex · bp-alex · commit ab59ac5af4fa · 2021-08-02T16:51:06.000+10:00
https://github.blog/changelog/2020-10-29-github-actions-ubuntu-latest-workflows-will-use-ubuntu-20-04/
diff --git a/.github/workflows/maven.yml b/.github/workflows/maven.yml
@@ -43,7 +43,7 @@ jobs:
 
     strategy:
       matrix:
-        os: [ubuntu-16.04, ubuntu-latest, macos-latest, windows-latest]
+        os: [ubuntu-latest, macos-latest, windows-latest]
         java: [8, 11, 14, 15]
 
     steps:
