do_action( 'relevanssi_pre_the_content' )
do_action( 'relevanssi_post_the_content' )
These parameterless action hooks fire immediately before and after Relevanssi applies the_content on the excerpt content.
More information
Some Relevanssi default behaviour has been moved to these action hooks. The default behaviour is to run relevanssi_excerpt_pre_the_content() and relevanssi_kill_autoembed() on the pre hook and relevanssi_excerpt_post_the_content() on the post hook.
The relevanssi_kill_autoembed() removes the autoembed discovery functionality (see this knowledge base entry) and the other functions disable and enable the prepend_attachment hook and make the noindex shortcode do it’s work.