Not to be rude, but isn’t this counterproductive to the whole system? Burning them and getting them out of the SRS queue isn’t the point, learning them and effectively internalizing them is. I feel like you’re conflating the two.
It is true that for most kanji you can just memorize their readings from the associated vocab. However, if you do this and just trash the kanji-only SRS items, it will become somewhat more difficult to read and understand the function of the kanji in unfamiliar words, as you’ll have to go through circuitous paths of “oh, this kanji in this vocab, which is different from that vocab, is read X, but not Y, but Z sometimes” when it’s just simpler to associate the reading and meaning with the individual kanji. Even though they’re just glosses, they’re fairly helpful ones.
I used to think like you did, until the 10-20 range. Then kanji started to get more similar and I had a hard time distinguishing them from each other. Something similar will probably affect your progress as well, though likely not at the same stages as me; to avoid almost getting burned out entirely, I strongly advise you to remember readings and meanings (glosses) properly and to each individual kanji.
Oh, and don’t abuse level-reordering. That can also affect your real-world performance, especially if you’re planning to speed through the WK program.