fix static analysis

Signed-off-by: szc321 <[email protected]>

src/lava/magma/runtime/message_infrastructure/pypychannel.py

@@ -258,7 +258,7 @@ def _req_callback(self, req):
                 not_empty = self.probe()
                 self._queue.put_nowait(0)
                 if self.observer and not not_empty:
-                    self.observer()
+                    self.observer()  # pylint: disable=E1102
         except EOFError:
             pass