Delete every 5th frame

Just for this specific problem I've made a simple script that you put on a time remap property

f=timeRemap*25;
(f+Math.floor((f-1)/4))/25

you can adjust the (f-1) part to match your footage if the duplicates are not 5,10,... but other frames.

There's this script which may work if it can detect those frames as actual duplicates:

https://aescripts.com/duplicate-frame-remover/

But also, I'm about to release a big update to this script:

https://aescripts.com/pt_framerestorer/

which lets you do that and much more. In this case you could do it without even needing to detect the duplicates, you'd just add a couple of layer markers spaced 5 frames apart, use the script to repeat them across the footage, then use the Insert function set to -1 to remove those frames. Or if you felt the motion was then jumping at those points, indicating a frame had actually been lost, you could instead replace those frames with new ones created using motion interpolation.

There are so many potential footage problems from dropped frames on capture to frame rate conversion issues like this and FrameRestorer is designed to deal with all of those issues.

If you open a support ticket for FrameRestorer on aescripts to get in touch with me I can sort you out with the latest beta. No need to buy anything.