Revert "(to be reverted) add debug.PrintStack."

This reverts commit f8c3756ac0.

lib/blockstore/badger/blockstore.go

@@ -4,7 +4,6 @@ import (
 	"context"
 	"fmt"
 	"io"
-	"runtime/debug"
 	"sync/atomic"
 
 	"github.com/dgraph-io/badger/v2"
@@ -188,9 +187,6 @@ func (b *Blockstore) Get(cid cid.Cid) (blocks.Block, error) {
 		return nil, ErrBlockstoreClosed
 	}
 
-	fmt.Println("***** badger/blockstore.Get called:")
-	debug.PrintStack()
-
 	k, pooled := b.PooledStorageKey(cid)
 	if pooled {
 		defer KeyPool.Put(k)