Another 4.4 feature to disable: the new srcset functionality.

https://wordpress.org/support/topic/is-it-possible-to-disable-the-responsive-image-srcset-on-wordpress-44?replies=19 describes people having issues with srcset, plus a solution created to go back to 4.3 img functionality. The lazy load plugin I'm using does not currently work with srcset, so for me it is necessary to disable srcset until the lazy load plugin solves the issue (otherwise site performance is significantly impacted due to no lazy loading).