Revert "Relocate prometheus-nginxlog-exporter (#4938)"

This reverts commit 789e2ad.

Author: luschmar

setup.yml

@@ -100,7 +100,6 @@
     - custom/matrix-synapse-usage-exporter
     - galaxy/prometheus_nginxlog_exporter
     - galaxy/matrix_meshtastic_relay
-    - galaxy/prometheus_nginxlog_exporter
     - galaxy/matrix_meshtastic_relay
     - galaxy/prometheus_node_exporter
     - galaxy/prometheus_postgres_exporter