Update pipeline.yml

Author: ChrisRackauckas

.buildkite/pipeline.yml

@@ -20,7 +20,6 @@ steps:
       os: "linux"
       queue: "juliaecosystem"
       arch: "x86_64"
-      debug_plugin: "true"
     timeout_in_minutes: 240
     # Don't run Buildkite if the commit message includes the text [skip tests]
     if: build.message !~ /\[skip tests\]/