Revert "Set an initial timestamp for new Kinesis streams"

cmd/internal/config/config.go

@@ -129,8 +129,6 @@ type StreamConfig struct {
 	E164StreamName     envstr `yaml:"e164-stream-name"`
 	UsernameStreamName envstr `yaml:"username-stream-name"`
 
-	NewStreams []string `yaml:"new-streams"`
-
 	// If TableName is not provided, backfill will not be attempted.
 	TableName envstr `yaml:"table"`
 }

cmd/kt-server/main.go

@@ -17,7 +17,6 @@ import (
 	"os"
 	"os/signal"
 	"runtime"
-	"slices"
 	"syscall"
 	"time"
 
@@ -208,11 +207,6 @@ func main() {
 					var streamStartTimestamp *time.Time
 					if backfillStreamStartTimestamp != nil {
 						streamStartTimestamp = backfillStreamStartTimestamp
-					} else {
-						if slices.Contains(config.StreamConfig.NewStreams, streamName) {
-							start := time.Now().Add(-time.Minute * 15)
-							streamStartTimestamp = &start
-						}
 					}
 
 					util.Log().Infof("Starting stream processing from Kinesis stream: %s", streamName)