xmlto: check upstream version tags, not new commits

With 0.0.29 upstream is tagging versions again.

(From OE-Core rev: 5250f021d73ba78ade312734b42fdbbe347cca03)

Signed-off-by: Alexander Kanavin <alex@linutronix.de>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/xmlto/xmlto_0.0.29.bb

@@ -7,7 +7,6 @@ LICENSE = "GPL-2.0-only"
 LIC_FILES_CHKSUM = "file://COPYING;md5=59530bdf33659b29e73d4adb9f9f6552"
 
 SRCREV = "74862a684907ada3d4ed2ce0f8111adf626e1456"
-UPSTREAM_CHECK_COMMITS = "1"
 SRC_URI = "git://pagure.io/xmlto.git;protocol=https;branch=master"
 S = "${WORKDIR}/git"