tests/stream_test.go: Remove duplicate import

The protobuf package ./src/proto was being imported twice with names
simple and testproto. Use the name simple consistently since that is
used more often, and is the same name used in the other test files.

tests/stream_test.go

@@ -9,7 +9,6 @@ import (
 	fuzz "github.com/google/gofuzz"
 	"github.com/richardartoul/molecule"
 	simple "github.com/richardartoul/molecule/src/proto"
-	testproto "github.com/richardartoul/molecule/src/proto"
 	"github.com/stretchr/testify/require"
 	"google.golang.org/protobuf/proto"
 	"gotest.tools/assert"
@@ -57,7 +56,7 @@ func TestSimpleEncoding(t *testing.T) {
 	require.NoError(t, ps.Int64Packed(fieldRepeatedInt64Packed, []int64{-1, 2, 3}))
 
 	buf := output.Bytes()
-	var res testproto.Simple
+	var res simple.Simple
 
 	require.NoError(t, proto.Unmarshal(buf, &res))
 
@@ -395,7 +394,7 @@ func TestEmbedding(t *testing.T) {
 	require.NoError(t, ps.Embedded(fieldNestedMessage, makeMsg("hello")))
 
 	buf := output.Bytes()
-	var res testproto.Nested
+	var res simple.Nested
 
 	require.NoError(t, proto.Unmarshal(buf, &res))