<?php
add_action( 'after_setup_theme', 'remove_the_wpautop_function' );

function remove_the_wpautop_function() {
    remove_filter( 'the_content', 'wpautop' );
   // remove_filter( 'the_excerpt', 'wpautop' );
}


 // to remove auto generated p tag only in amp site of ampforwp plugin then you can use the pre_amp_render_post hook
  //add_action( 'pre_amp_render_post', 'remove_the_wpautop_function_amp' );

  ?>