all: use EmptyUncleHash, EmptyCodeHash instead of raw value (#29134)

cmd/devp2p/internal/ethtest/snap.go

@@ -648,7 +648,7 @@ The server should reject the request.`,
 					0, 1, 2, 3, 4, 5, 6, 7, 8, 0, 1, 2, 3, 4, 5, 6, 7, 8, 0, 1, 2, 3, 4, 5, 6, 7, 8}},
 			},
 			nBytes:    5000,
-			expHashes: []common.Hash{common.HexToHash("0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470")},
+			expHashes: []common.Hash{types.EmptyCodeHash},
 		},
 
 		{

core/types/block_test.go

@@ -196,7 +196,7 @@ func TestEIP2718BlockEncoding(t *testing.T) {
 func TestUncleHash(t *testing.T) {
 	uncles := make([]*Header, 0)
 	h := CalcUncleHash(uncles)
-	exp := common.HexToHash("1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347")
+	exp := EmptyUncleHash
 	if h != exp {
 		t.Fatalf("empty uncle hash is wrong, got %x != %x", h, exp)
 	}