Update playTests.sh

combination of -r with empty folder simplified to comply with sh compatibility tests

tests/playTests.sh

@@ -392,14 +392,7 @@ zstd -c -r < tmp > tmp.zst
 
 # combination of -r with empty folder
 mkdir -p tmpEmptyDir
-zstd -r tmpEmptyDir 2>tmplog2
-if [ grep "aborting" tmplog2 ]; then
-  println "Should not abort on empty directory"
-  rm -rf tmplog2
-  rm -rf tmpEmptyDir
-  die
-fi
-rm -rf tmplog2
+zstd -r tmpEmptyDir
 rm -rf tmpEmptyDir