pixiv: drop support for https://tc-pximg01.techorus-cdn.com urls.

This was an obsolete URL format briefly used by Pixiv around 2019-2020.
There were only ~80 posts with sources using this format. They have been
manually fixed.

app/logical/source/url/pixiv.rb

@@ -7,7 +7,7 @@ module Source
     def self.match?(url)
       return false if Source::URL::Fanbox.match?(url) || Source::URL::PixivSketch.match?(url) || Source::URL::Booth.match?(url)
 
-      url.domain.in?(%w[pximg.net pixiv.net pixiv.me pixiv.cc]) || url.host == "tc-pximg01.techorus-cdn.com"
+      url.domain.in?(%w[pximg.net pixiv.net pixiv.me pixiv.cc])
     end
 
     def parse
@@ -22,7 +22,6 @@ module Source
       # https://i-f.pximg.net/img-original/img/2020/02/19/00/40/18/79584713_p0.png
       # http://i1.pixiv.net/img-inf/img/2011/05/01/23/28/04/18557054_64x64.jpg
       # http://i1.pixiv.net/img-inf/img/2011/05/01/23/28/04/18557054_s.png
-      # https://tc-pximg01.techorus-cdn.com/img-original/img/2017/09/18/03/18/24/65015428_p4.png
       #
       # but not:
       #
@@ -123,10 +122,9 @@ module Source
     def image_url?
       # https://i.pximg.net/img-original/img/2014/10/03/18/10/20/46324488_p0.png
       # https://i-f.pximg.net/img-original/img/2020/02/19/00/40/18/79584713_p0.png
-      # https://tc-pximg01.techorus-cdn.com/img-original/img/2017/09/18/03/18/24/65015428_p4.png
       # https://i2.pixiv.net/img04/img/syounen_no_uta/46170939_p0.jpg
       # http://img18.pixiv.net/img/evazion/14901720.png
-      host.in?(["i.pximg.net", "i-f.pximg.net", "tc-pximg01.techorus-cdn.com"]) || host.match?(/\A(i\d+|img\d+)\.pixiv\.net\z/)
+      host.in?(%w[i.pximg.net i-f.pximg.net]) || host.match?(/\A(i\d+|img\d+)\.pixiv\.net\z/)
     end
 
     def full_image_url?

test/unit/sources/pixiv_test.rb

@@ -59,15 +59,6 @@ module Sources
         end
       end
 
-      context "A https://tc-pximg01.techorus-cdn.com/img-original/img/* source" do
-        should "get the metadata" do
-          @site = Source::Extractor.find("https://tc-pximg01.techorus-cdn.com/img-original/img/2017/09/18/03/18/24/65015428_p4.png")
-
-          assert_equal(["https://i.pximg.net/img-original/img/2017/09/18/03/18/24/65015428_p4.png"], @site.image_urls)
-          assert_equal("赤井さしみ", @site.artist_name)
-        end
-      end
-
       context "A https://www.pixiv.net/*/artworks/* source" do
         should "work" do
           @site = Source::Extractor.find("https://www.pixiv.net/en/artworks/64476642")
@@ -332,8 +323,6 @@ module Sources
 
       context "parsing illust ids" do
         should "parse ids from illust urls" do
-          assert_illust_id(65015428, "https://tc-pximg01.techorus-cdn.com/img-original/img/2017/09/18/03/18/24/65015428_p4.png")
-
           assert_illust_id(46785915, "https://i.pximg.net/c/250x250_80_a2/img-master/img/2014/10/29/09/27/19/46785915_p0_square1200.jpg")
           assert_illust_id(79584713, "https://i-f.pximg.net/img-original/img/2020/02/19/00/40/18/79584713_p0.png")
 
@@ -389,7 +378,6 @@ module Sources
       assert(Source::URL.image_url?("https://i.pximg.net/c/250x250_80_a2/img-master/img/2014/10/29/09/27/19/46785915_p0_square1200.jpg"))
       assert(Source::URL.image_url?("https://i-f.pximg.net/img-original/img/2020/02/19/00/40/18/79584713_p0.png"))
       assert(Source::URL.image_url?("http://i1.pixiv.net/img-inf/img/2011/05/01/23/28/04/18557054_64x64.jpg"))
-      assert(Source::URL.image_url?("https://tc-pximg01.techorus-cdn.com/img-original/img/2017/09/18/03/18/24/65015428_p4.png"))
       assert(Source::URL.image_url?("http://img18.pixiv.net/img/evazion/14901720.png"))
       assert(Source::URL.image_url?("http://i2.pixiv.net/img18/img/evazion/14901720.png"))