logical: remove SetLogger method

logical/logical.go

@@ -22,14 +22,6 @@ type Backend interface {
 	// ends in '*' then it is a prefix-based match. The '*' can only appear
 	// at the end.
 	SpecialPaths() *Paths
-
-	// SetLogger is called to set the logger for the backend. The backend
-	// should use this logger. The log should not contain any secrets.
-	// It should not be assumed that this function will be called every time.
-	//
-	// SetLogger will not be called by Vault core in parallel, and
-	// therefore doesn't need any lock protection.
-	SetLogger(*log.Logger)
 }
 
 // BackendConfig is provided to the factory to initialize the backend

vault/router_test.go

@@ -2,7 +2,6 @@ package vault
 
 import (
 	"fmt"
-	"log"
 	"strings"
 	"sync"
 	"testing"
@@ -19,7 +18,6 @@ type NoopBackend struct {
 	Paths    []string
 	Requests []*logical.Request
 	Response *logical.Response
-	Logger   *log.Logger
 }
 
 func (n *NoopBackend) HandleRequest(req *logical.Request) (*logical.Response, error) {
@@ -43,10 +41,6 @@ func (n *NoopBackend) SpecialPaths() *logical.Paths {
 	}
 }
 
-func (n *NoopBackend) SetLogger(l *log.Logger) {
-	n.Logger = l
-}
-
 func TestRouter_Mount(t *testing.T) {
 	r := NewRouter()
 	_, barrier, _ := mockBarrier(t)

vault/testing.go

@@ -1,7 +1,6 @@
 package vault
 
 import (
-	"log"
 	"testing"
 
 	"github.com/hashicorp/vault/audit"
@@ -109,5 +108,3 @@ func (n *rawHTTP) HandleRequest(req *logical.Request) (*logical.Response, error)
 func (n *rawHTTP) SpecialPaths() *logical.Paths {
 	return &logical.Paths{Unauthenticated: []string{"*"}}
 }
-
-func (n *rawHTTP) SetLogger(l *log.Logger) {}