Remove unused variables.

src/connection.c

@@ -60,8 +60,6 @@ int pysqlite_connection_init(pysqlite_Connection* self, PyObject* args, PyObject
     int cached_statements = 100;
     double timeout = 5.0;
     int rc;
-    PyObject* class_attr = NULL;
-    PyObject* class_attr_str = NULL;
     PyObject* database_utf8;
 
     if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O|diOiOi", kwlist,
@@ -211,8 +209,6 @@ void pysqlite_do_all_statements(pysqlite_Connection* self, int action)
 
 void pysqlite_connection_dealloc(pysqlite_Connection* self)
 {
-    PyObject* ret = NULL;
-
     Py_XDECREF(self->statement_cache);
 
     /* Clean up if user has not called .close() explicitly. */

src/cursor.c

@@ -404,8 +404,6 @@ static int check_cursor(pysqlite_Cursor* cur)
 PyObject* _pysqlite_query_execute(pysqlite_Cursor* self, int multiple, PyObject* args)
 {
     PyObject* operation;
-    PyObject* operation_bytestr = NULL;
-    char* operation_cstr;
     PyObject* parameters_list = NULL;
     PyObject* parameters_iter = NULL;
     PyObject* parameters = NULL;
@@ -494,17 +492,6 @@ PyObject* _pysqlite_query_execute(pysqlite_Cursor* self, int multiple, PyObject*
         rc = pysqlite_statement_reset(self->statement);
     }
 
-    if (PyString_Check(operation)) {
-        operation_cstr = PyString_AsString(operation);
-    } else {
-        operation_bytestr = PyUnicode_AsUTF8String(operation);
-        if (!operation_bytestr) {
-            goto error;
-        }
-
-        operation_cstr = PyString_AsString(operation_bytestr);
-    }
-
     /* reset description and rowcount */
     Py_DECREF(self->description);
     Py_INCREF(Py_None);
@@ -655,7 +642,6 @@ PyObject* _pysqlite_query_execute(pysqlite_Cursor* self, int multiple, PyObject*
     }
 
 error:
-    Py_XDECREF(operation_bytestr);
     Py_XDECREF(parameters);
     Py_XDECREF(parameters_iter);
     Py_XDECREF(parameters_list);

src/statement.c

@@ -401,11 +401,9 @@ void pysqlite_statement_mark_dirty(pysqlite_Statement* self)
 
 void pysqlite_statement_dealloc(pysqlite_Statement* self)
 {
-    int rc;
-
     if (self->st) {
         Py_BEGIN_ALLOW_THREADS
-        rc = sqlite3_finalize(self->st);
+        (void)sqlite3_finalize(self->st);
         Py_END_ALLOW_THREADS
     }