Remove the support for older dynamic jekyll workflows

The pages dynamic workflow now decouples telemetry from deploy for 100%
of users, so we can remove this old conditional.

src/index.js

@@ -55,9 +55,6 @@ process.on('SIGTERM', cancelHandler)
 const emitTelemetry = core.getInput("emit_telemetry")
 if (emitTelemetry === "true") {
   require('./pre')
-} else if (emitTelemetry === "false") {
-  main()
 } else {
-  // If emit_telemetry is not set, that indicates an older version of the dynamic workflow that doesn't separate telemetry from deployment
-  main().then(() => require('./pre'))
+  main()
 }