In setup.sh, delete any leftover yarn release artifacts

Author: milesrichardson

setup.sh

@@ -101,9 +101,16 @@ dir_has_yarn_release() {
     local prefixDir="$1"
     shift
 
+    # Clean up old files that are deprecated and shouldn't be checked in anymore if they exist
     if test -f "$prefixDir"/.yarn/releases/yarn-rc.js ; then
         rm "$prefixDir"/.yarn/releases/yarn-rc.js
     fi
+    if test -f "$prefixDir"/.yarn/releases/yarn-berry.cjs ; then
+        rm "$prefixDir"/.yarn/releases/yarn-berry.cjs
+    fi
+    if test -f "$prefixDir"/.yarn/plugins/@yarnpkg/plugin-workspace-tools.cjs ; then
+        rm "$prefixDir"/.yarn/plugins/@yarnpkg/plugin-workspace-tools.cjs
+    fi
 
     if has_broken_yarn "$prefixDir" ; then
         echo "yarn seems broken in $prefixDir, remove .yarnrc.yml"