Reenable melting pot -_-

I meant to reenable it immediately after releasing
net.imagej:imagej:2.16.0 and sc.fiji:fiji:2.16.0, but failed to do so.
SHAME AND DISGRACE

Author: ctrueden

.github/build.sh

@@ -10,10 +10,6 @@ fi
 curl -fsLO https://raw.githubusercontent.com/scijava/scijava-scripts/master/ci-build.sh &&
 sh ci-build.sh || { echo "Maven build failed. Skipping melting pot tests."; exit 1; }
 
-# TEMP: Disable melting pot until net.imagej:imagej and sc.fiji:fiji are released.
-echo "Skipping melting pot tests due to preemptive version bumps."
-exit 0
-
 # Skip melting pot if cutting a release.
 if [ "$releasing" ]; then
   exit 0