Revert "BUG/MEDIUM: H1: When upgrading, make sure we don't free the buffer too early."

This reverts commit 6c7fe5c3700fac7cc945b2b756df30874cbf77a6.

This patch was harmless, but not needed, conn_upgrade_mux_fe() already takes
care of setting the buffer to BUF_NULL.
1 file changed