Well it's been a while, but off the top of my head, let's see...
The robots wandering the desert could be cut. They wander around, get captured by the sand guys and sold to Luke's parents. Just have Luke out exploring and he finds them, saves a few minutes and we don't have to put up with the robots as much.
I remember like, two or three scenes of Obi-wan and Luke in the spaceport looking for Han's ship showing they were being followed. I get it, you don't need to show us this over and over.
The training scene as described above.
Honestly, that's all I can recall at the moment. Sorry, it was a few months ago, if it's on some time say, later this week, I'll elaborate
Though thinking back I remember one piece of dialogue that was particularly dumb. When they enter the bar and the bartender is like "we don't like their kind in here" and kicks the robots out. That is just so lame and...pointless. I thought "oh, the robots gotta get captured while they're inside?" and I don't remember that happening so nope, just a really dumb line.
Also, two more scene complaints.
Obi-wan's death scene......why? You wanna kill Obi-wan off as he fights Vader, okay, but he just sorta closed his eyes and let Vader kill him. Why? Was he taking a moment to channel his energy so he could come back as the Force ghost thing? I don't recall them explaining such if that's the reason. Would have been more interesting if Luke called out to him and while he was distracted Vader did him in. I just never got why Obi-wan just stopped fighting and let Vader kill him. Also the fight itself was boring, but I'll let it go because I've read how fragile the lightsaber props were in the first film, so not much they can do about that to be fair.
And where Obi-wan stops the generator and slips past the stormtroopers. Once again the empire is incredibly stupid and the heroes only make progress because of this fact. Dudes, just fucking turn around! Just, turn your heads two inches to the left and look over your damn shoulder! Oh nevermind, even if you did catch Obi-wan he'd just have to point and go "look over there!" to escape.
That's because, for the most part, Luke is a generic hero. He's the classic 'fish out of water' character used to establish a connection with the audience. It was after the fans were hooked that they could further develop his character in the rest of the trilogy.
Fair enough, but I didn't connect with him. He seemed eternally clueless on what's going on around him and is just swept up for the ride.
I'll note that a certain four-letter name beginning with "V" popped into my head reading that over, but that would be mean, Luke may not be interesting but he's far too cool for that comparison.