As far as I'm aware, the boulders that are underwater in Great Bay are the only objects in the game that can be lifted with the "heavy lift" animation from OoT (used when lifting heavy objects with gauntlets). The grunt Goron makes also seems to be unused.

This can be done entirely without cheats, as shown in the video. Start a Zora Hover (more info here:    • Underwater Items (Like Like Glitch)  ), make your way to shore, and then you can make your way down to the boulders. From here, Goron can lift these boulders with an "unused" animation (and Zora too on the Japanese version)!