Remove the dead METEO_* fetch path

Confirmed via git history it's not a separate vendor: the very first
commit (2023-04-13) included real sample CSVs from it with a Latvian
header identical to the LVGMC/open-data fields — same underlying LVĢMC
data, just an earlier delivery mechanism superseded by the FTP feed and
never removed. Never wired into anything that runs (Server.scala's
import was already commented out).

src/main/scala/server/Server.scala

@@ -6,7 +6,6 @@ import com.comcast.ip4s.IpLiteralSyntax
 import data.DataService
 import db.PostgresService
 import fetch.csv.FileNameService
-//import fetch.csv.FetchService
 import fetch.lvgmc.FetchService
 import fetch.warnings.WarningService
 import fs2.io.file.{Files, Path}