Remove unused PGPASSWORD environment variable

Author: bkoelman

.github/workflows/build.yml

@@ -23,10 +23,6 @@ concurrency:
 env:
   DOTNET_SKIP_FIRST_TIME_EXPERIENCE: true
   DOTNET_CLI_TELEMETRY_OPTOUT: true
-  # The Windows runner image has PostgreSQL pre-installed and sets the PGPASSWORD environment variable to "root".
-  # This conflicts with the default password "postgres", which is used by ikalnytskyi/action-setup-postgres.
-  # Because action-setup-postgres forgets to update the environment variable accordingly, we do so here.
-  PGPASSWORD: "postgres"
 
 jobs:
   build-and-test: