logger, pow/dagger, pow/ezp: delete dead code

errs/errors_test.go

@@ -19,8 +19,6 @@ package errs
 import (
 	"fmt"
 	"testing"
-
-	"github.com/ethereum/go-ethereum/logger"
 )
 
 func testErrors() *Errors {
@@ -30,14 +28,6 @@ func testErrors() *Errors {
 			0: "zero",
 			1: "one",
 		},
-		Level: func(i int) (l logger.LogLevel) {
-			if i == 0 {
-				l = logger.ErrorLevel
-			} else {
-				l = logger.WarnLevel
-			}
-			return
-		},
 	}
 }
 
@@ -49,14 +39,3 @@ func TestErrorMessage(t *testing.T) {
 		t.Errorf("error message incorrect. expected %v, got %v", exp, message)
 	}
 }
-
-func TestErrorSeverity(t *testing.T) {
-	err0 := testErrors().New(0, "zero detail")
-	if !err0.Fatal() {
-		t.Errorf("error should be fatal")
-	}
-	err1 := testErrors().New(1, "one detail")
-	if err1.Fatal() {
-		t.Errorf("error should not be fatal")
-	}
-}