CLEANUP: quic: remove unused quic_rx_strm_frm

quic_rx_strm_frm type was used to buffered STREAM frames received out of
order. Now the MUX is able to deal directly with these frames and
buffered it inside its ncbuf.
diff --git a/include/haproxy/xprt_quic-t.h b/include/haproxy/xprt_quic-t.h
index 86cbe0e..c9d4b1d 100644
--- a/include/haproxy/xprt_quic-t.h
+++ b/include/haproxy/xprt_quic-t.h
@@ -513,15 +513,6 @@
 	struct quic_rx_packet *pkt;
 };
 
-/* Structure to store information about RX STREAM frames. */
-struct quic_rx_strm_frm {
-	struct eb64_node offset_node;
-	uint64_t len;
-	const unsigned char *data;
-	int fin;
-	struct quic_rx_packet *pkt;
-};
-
 /* Flag a sent packet as being an ack-eliciting packet. */
 #define QUIC_FL_TX_PACKET_ACK_ELICITING (1UL << 0)
 /* Flag a sent packet as containing a PADDING frame. */
diff --git a/src/xprt_quic.c b/src/xprt_quic.c
index 099ce67..bc290fa 100644
--- a/src/xprt_quic.c
+++ b/src/xprt_quic.c
@@ -167,7 +167,6 @@
 DECLARE_POOL(pool_head_quic_rx_packet, "quic_rx_packet_pool", sizeof(struct quic_rx_packet));
 DECLARE_POOL(pool_head_quic_tx_packet, "quic_tx_packet_pool", sizeof(struct quic_tx_packet));
 DECLARE_STATIC_POOL(pool_head_quic_rx_crypto_frm, "quic_rx_crypto_frm_pool", sizeof(struct quic_rx_crypto_frm));
-DECLARE_POOL(pool_head_quic_rx_strm_frm, "quic_rx_strm_frm", sizeof(struct quic_rx_strm_frm));
 DECLARE_STATIC_POOL(pool_head_quic_crypto_buf, "quic_crypto_buf_pool", sizeof(struct quic_crypto_buf));
 DECLARE_POOL(pool_head_quic_frame, "quic_frame_pool", sizeof(struct quic_frame));
 DECLARE_STATIC_POOL(pool_head_quic_arng, "quic_arng_pool", sizeof(struct quic_arng_node));
@@ -2149,28 +2148,6 @@
 	return 0;
 }
 
-/* Allocate a new STREAM RX frame from <stream_fm> STREAM frame attached to
- * <pkt> RX packet.
- * Return it if succeeded, NULL if not.
- */
-static inline
-struct quic_rx_strm_frm *new_quic_rx_strm_frm(struct quic_stream *stream_frm,
-                                              struct quic_rx_packet *pkt)
-{
-	struct quic_rx_strm_frm *frm;
-
-	frm = pool_alloc(pool_head_quic_rx_strm_frm);
-	if (frm) {
-		frm->offset_node.key = stream_frm->offset.key;
-		frm->len = stream_frm->len;
-		frm->data = stream_frm->data;
-		frm->pkt = pkt;
-		frm->fin = stream_frm->fin;
-	}
-
-	return frm;
-}
-
 /* Handle <strm_frm> bidirectional STREAM frame. Depending on its ID, several
  * streams may be open. The data are copied to the stream RX buffer if possible.
  * If not, the STREAM frame is stored to be treated again later.