Remove the lines that checked for existing upload with the same source.
These lines were breaking replacements in many cases, so we had to
always empty the post's source before replacing, and they served no
purpose since the md5 check already catches duplicate uploads.
This reverts commit e83d07ea7b.
It was worth a try, but unfortunately it seems that once
someone sets tools in a Pixiv upload, they become defaults and
are applied to all of their subsequent uploads, so we get some
posts with two or three different digital tags.
* Get rid of mechanize, fully switch to Danbooru::Http
* Switch to mobile api, improving speed
* Merge main and manga clients
* Add full support for manga pages
* Add support for anonymous and r-15 images
* Don't fail when attempting to upload oekaki direct links
* Various misc fixes
* Move the source normalization logic out of the post model
and into individual sources' strategies.
* Rewrite normalization tests to be handled into each source's test,
and expand them significantly. Previously we were only testing
a very small subset of domains and variants.
* Fix up normalization for several sites.
* Normalize fav.me urls into normal deviantart urls.
nonamethanks