diff --git a/backend/s3/cont_reader.go b/backend/s3/cont_reader.go
index da0ef4000..77bd1dca1 100644
--- a/backend/s3/cont_reader.go
+++ b/backend/s3/cont_reader.go
@@ -1,9 +1,6 @@
 package s3
 
-import (
-	"fmt"
-	"io"
-)
+import "io"
 
 // ContinuousReader implements an io.Reader on top of an io.ReaderAt, advancing
 // an offset.
@@ -13,11 +10,7 @@ type ContinuousReader struct {
 }
 
 func (c *ContinuousReader) Read(p []byte) (int, error) {
-	fmt.Printf("ContinuousReader %p: ReadAt(offset %v)\n", c, c.Offset)
 	n, err := c.R.ReadAt(p, c.Offset)
-	fmt.Printf("ContinuousReader %p: len(p) = %v, n %v, err %v\n",
-		c, len(p), n, err)
-	fmt.Printf("  %02x\n", p[:n])
 	c.Offset += int64(n)
 	return n, err
 }