chore(ext): remove Logspout extension

This software is no longer maintained.

Nowadays, Filebeat largely addresses the problems that Logspout was
designed to solve.

.github/workflows/ci.yml

@@ -30,7 +30,6 @@ jobs:
         run: >-
           docker compose
           -f docker-compose.yml
-          -f extensions/logspout/logspout-compose.yml
           -f extensions/fleet/fleet-compose.yml
           -f extensions/fleet/agent-apmserver-compose.yml
           -f extensions/metricbeat/metricbeat-compose.yml
@@ -82,34 +81,6 @@ jobs:
       #                            #
       ##############################
 
-      #
-      # Logspout
-      #
-
-      - name: Execute Logspout test suite
-        run: |
-
-          # Set mandatory Logstash settings
-
-          sed -i '$ a input { udp { port => 50000 codec => json } }' logstash/pipeline/logstash.conf
-
-          # Restart Logstash for changes to take effect
-
-          docker compose restart logstash
-
-          # Run Logspout and execute tests.
-
-          docker compose -f docker-compose.yml -f extensions/logspout/logspout-compose.yml up --remove-orphans -d logspout
-          .github/workflows/scripts/run-tests-logspout.sh
-
-          # Revert changes to Logstash configuration
-
-          sed -i '/input { udp { port => 50000 codec => json } }/d' logstash/pipeline/logstash.conf
-          docker compose restart logstash
-
-          # next steps don't need Logstash
-          docker compose stop logstash
-
       #
       # Fleet
       #
@@ -181,7 +152,6 @@ jobs:
 
           docker compose \
           -f docker-compose.yml \
-          -f extensions/logspout/logspout-compose.yml \
           -f extensions/fleet/fleet-compose.yml \
           -f extensions/fleet/agent-apmserver-compose.yml \
           -f extensions/metricbeat/metricbeat-compose.yml \
@@ -192,7 +162,6 @@ jobs:
 
           docker compose \
           -f docker-compose.yml \
-          -f extensions/logspout/logspout-compose.yml \
           -f extensions/fleet/fleet-compose.yml \
           -f extensions/fleet/agent-apmserver-compose.yml \
           -f extensions/metricbeat/metricbeat-compose.yml \
@@ -221,7 +190,6 @@ jobs:
         run: >-
           docker compose
           -f docker-compose.yml
-          -f extensions/logspout/logspout-compose.yml
           -f extensions/fleet/fleet-compose.yml
           -f extensions/fleet/agent-apmserver-compose.yml
           -f extensions/metricbeat/metricbeat-compose.yml