[type/__package_opkg] Do not lock execution of code-remote (revert)

Instead, rely on `nonparallel`.
In any case cdist should never run explorer and code concurrently even if the
dependency graph would allow to do so as it would result in many more
synchronization issues than this one.

cdist/conf/type/__package_opkg/gencode-remote

@@ -46,34 +46,6 @@ then
 	exit 0
 fi
 
-cat <<'EOF'
-readonly __type_path=${__object%%${__object_id}*}
-readonly LOCKFILE="${__type_path}/cdist_opkg.lock"
-
-_lock() (
-	set -o noclobber
-	until echo $$>"${LOCKFILE}"
-	do
-		while test -f "${LOCKFILE}"; do sleep 1; done
-	done
-
-) 2>/dev/null
-_unlock() {
-	if test -s "${LOCKFILE}" && test "$(cat "${LOCKFILE}")" = $$
-	then
-		rm "${LOCKFILE}"
-	fi
-}
-EOF
-
-# NOTE: We need to lock parallel execution of code-remote to ensure that it is
-# not executed concurrently with a type explorer.
-# opkg will try to acquire the OPKG lock (usually /var/lock/opkg.lock) using
-# lockf(2) for every operation.
-# It will not wait for the lock but terminate with an error leading to an
-# incorrect outcome.
-echo 'trap _unlock EXIT'
-echo '_lock'
 
 case $state_should
 in