Revert "initial attempt to integrate surf http client"

This reverts commit 538d52d064.

reddit/reddit-options_test.go

@@ -2,6 +2,7 @@ package reddit
 
 import (
 	"fmt"
+	"net/http"
 	"net/url"
 	"os"
 	"testing"
@@ -9,6 +10,14 @@ import (
 	"github.com/stretchr/testify/require"
 )
 
+func TestWithHTTPClient(t *testing.T) {
+	_, err := NewClient(Credentials{}, WithHTTPClient(nil))
+	require.EqualError(t, err, "*http.Client: cannot be nil")
+
+	_, err = NewClient(Credentials{}, WithHTTPClient(&http.Client{}))
+	require.NoError(t, err)
+}
+
 func TestWithUserAgent(t *testing.T) {
 	c, err := NewClient(Credentials{}, WithUserAgent("test"))
 	require.NoError(t, err)