validate-docx.sh - revert checking of _rels.

These generate "no matching global declaration" so they can't
be validated.

tools/validate-docx.sh

@@ -9,8 +9,8 @@ for file in "$@"; do
   file_errors=0
   echo "*** Checking $file"
   rm -rf "$tmpdir"
-  unzip -q -o -j "$file" "word/*.xml" "word/_rels/*.xml" -d "$tmpdir"
-  for i in "$tmpdir"/*.xml; do
+  unzip -q -o -j "$file" "word/*.xml" -d "$tmpdir"
+  for i in "$tmpdir"/*.xml ; do
     xmllint --format "${i}" > "${i}.pretty.xml"
   done
   XSD="./docx-validator/schemas/microsoft/wml-2010.xsd"