moved buffer closer to its usage in Firehose

pkg/pipe/utils.go

@@ -7,7 +7,6 @@ import (
 	"log"
 	"os"
 	"os/signal"
-	"slices"
 	"syscall"
 
 	"github.com/nbd-wtf/go-nostr"
@@ -73,25 +72,3 @@ func shutdown(pool *nostr.SimplePool) {
 		return true
 	})
 }
-
-type buffer struct {
-	IDs      []string
-	capacity int
-	write    int
-}
-
-func newBuffer(capacity int) *buffer {
-	return &buffer{
-		IDs:      make([]string, capacity),
-		capacity: capacity,
-	}
-}
-
-func (b *buffer) Add(ID string) {
-	b.IDs[b.write] = ID
-	b.write = (b.write + 1) % b.capacity
-}
-
-func (b *buffer) Contains(ID string) bool {
-	return slices.Contains(b.IDs, ID)
-}