gfe-relnote: n/a (code clean-up) Remove unnecessary #include in quic_stream_send_buffer.cc
gfe-relnote: n/a (code clean-up) Remove unnecessary #include in quic_stream_send_buffer.cc

PiperOrigin-RevId: 239193423
Change-Id: I2569875627d2355622f80a10f06d28f1be4b8e11

google/quiche,google/quiche,google/quiche,google/quiche