Skipping same old introductions
You need to include the introduction to your paper because it might be the first paper in that field the reader is about to read.
Your introduction should depend on the journal/conference you are submitting to as that will help define your audience. If you are submitting to "The Journal of Adversarial Examples for Neural Networks", you can probably skip over a lot of the general intro material and assume that someone reading this journal should be familiar with the common challenges you are working on here. For that type of journal, your intro should focus more on the specific limitations of prior research that your work seeks to overcome. Generally these introductions actually end up longer and/or also include a "related works" section to allow you to key in on where your work really stands out.
On the other hand, if you are submitting to a more general interest journal like "Science" or "Nature", you need to do a lot more work covering the basics and usually in a very short space. For these types of journals, the "guff" may actually be valuable information as the readers may not even be aware your field existed before reading your paper. The challenge is getting everyone up to speed in the 200 words or so they give you to talk about it.
Most journals you will be submitting to will be somewhere in between. The general rule of thumb I use is to include in your intro everything your reader would need to know that they wouldn't also need to know for every single other paper in the journal. Even if 10% of the papers submitted to that journal are in your field, that means that 90% of the readers may not be working in that area, so you should at least give enough of an intro to your field to remind them of the things they need to know to understand your paper. That doesn't mean rambling for paragraphs, just enough to set up the more nuanced points so they don't miss the importance of your work.
Your work should be standalone and not rely on the assumption that the reader is familiar with the problem setup and motivation. If you’d like you can slightly shorten the spiel and reference an overview article/several notable papers that cover this. The setup is important because 1. Not everyone reading your paper is guaranteed to know the field 2. Even if they are this gives them some framework as to what they’ll be reading about today.