This reverts r63675 based on the discussion in this thread:

 http://mail.python.org/pipermail/python-dev/2008-June/079988.html

Python 2.6 should stick with PyString_* in its codebase.  The PyBytes_* names
in the spirit of 3.0 are available via a #define only.  See the email thread.
diff --git a/Modules/_sqlite/module.c b/Modules/_sqlite/module.c
index f77452c..af7eace 100644
--- a/Modules/_sqlite/module.c
+++ b/Modules/_sqlite/module.c
@@ -137,7 +137,7 @@
     /* a basic type is adapted; there's a performance optimization if that's not the case
      * (99 % of all usages) */
     if (type == &PyInt_Type || type == &PyLong_Type || type == &PyFloat_Type
-            || type == &PyBytes_Type || type == &PyUnicode_Type || type == &PyBuffer_Type) {
+            || type == &PyString_Type || type == &PyUnicode_Type || type == &PyBuffer_Type) {
         pysqlite_BaseTypeAdapted = 1;
     }
 
@@ -367,13 +367,13 @@
         Py_DECREF(tmp_obj);
     }
 
-    if (!(tmp_obj = PyBytes_FromString(PYSQLITE_VERSION))) {
+    if (!(tmp_obj = PyString_FromString(PYSQLITE_VERSION))) {
         goto error;
     }
     PyDict_SetItemString(dict, "version", tmp_obj);
     Py_DECREF(tmp_obj);
 
-    if (!(tmp_obj = PyBytes_FromString(sqlite3_libversion()))) {
+    if (!(tmp_obj = PyString_FromString(sqlite3_libversion()))) {
         goto error;
     }
     PyDict_SetItemString(dict, "sqlite_version", tmp_obj);