https://bugs.gentoo.org/867760

Drop check which looks at version as with newer libimagequant,
it becomes 4.0.0.
--- a/test/test.sh
+++ b/test/test.sh
@@ -9,7 +9,6 @@ BIN=$2
 TESTBIN=$3
 PATH=.:$PATH # Required, since BIN may be just 'pngquant'
 
-$BIN --version 2>&1 | fgrep 2.
 $BIN --help | fgrep -q "usage:"
 
 $BIN 2>/dev/null && { echo "should fail without args"; exit 1; } || true