Keep source plugins in single scraper process

tools/healthcheck-source-plugin.js

@@ -1,5 +0,0 @@
-'use strict';
-
-fetch('http://127.0.0.1:8094/health', { signal: AbortSignal.timeout(3000) })
-  .then(response => { if (!response.ok) process.exitCode = 1; })
-  .catch(() => { process.exitCode = 1; });