fix: Fixes BSP

**Problem**
Calling -bsp with --sbt-launch-jar causes "Unrecognized option: --server".
This is because --server is passed in twice since $7775

**Solution**
Since the server invocation by BSP client already passes in --server,
we can remove the extra --server append.

main-command/src/main/scala/sbt/internal/client/NetworkClient.scala

@@ -1127,7 +1127,6 @@ object NetworkClient {
         sbtArguments += s"-Dsbt.script=$sbtScript"
       }
     }
-    if (!sbtArguments.contains("--server")) sbtArguments += "--server"
     new Arguments(
       base,
       sbtArguments.toSeq,