Revert "Add qt-dir bin directory value to PATH - matching Qt tools may not found at build time anymore if not in front of PATH"

This reverts commit 535429d914.

development/LyX-Mac-binary-release.sh

@@ -187,7 +187,6 @@ while [ $# -gt 0 ]; do
 		;;
 	--with-qt-dir=*)
 		QTDIR=$(echo ${1}|cut -d= -f2)
-		export PATH="${QTDIR}/bin:${PATH}"
 		shift
 		;;
 	--with-macosx-target=*)