Remove unused function and related test

spec/helpers_spec.cr

@@ -41,12 +41,6 @@ describe "Helper" do
     end
   end
 
-  describe "#extract_channel_playlists_cursor" do
-    it "correctly extracts a playlists cursor from the given URL" do
-      extract_channel_playlists_cursor("4qmFsgLRARIYVUNDajk1NklGNjJGYlQ3R291c3phajl3GrQBRWdsd2JHRjViR2x6ZEhNWUF5QUJNQUk0QVdBQmFnQjZabEZWYkZCaE1XczFVbFpHZDJGV09XNWxWelI0V0RGR2VWSnVWbUZOV0Vwc1ZHcG5lRmd3TVU1aVZXdDRWMWN4YzFGdFNuTmtlbWh4VGpCd1NWTllVa1pTYTJNeFlVUmtlRmt3Y0ZWVWJWRXdWbnBzTkU1V1JqRmhNVGxFVm14dmQwMXFhRzVXZDdnQkFBJTNEJTNE", false).should eq("AIOkY9EQpi_gyn1_QrFuZ1reN81_MMmI1YmlBblw8j7JHItEFG5h7qcJTNd4W9x5Quk_CVZ028gW")
-    end
-  end
-
   describe "#produce_playlist_continuation" do
     it "correctly produces ctoken for requesting index `x` of a playlist" do
       produce_playlist_continuation("UUCla9fZca4I7KagBtgRGnOw", 100).should eq("4qmFsgJNEhpWTFVVQ2xhOWZaY2E0STdLYWdCdGdSR25PdxoUQ0FGNkJsQlVPa05IVVElM0QlM0SaAhhVVUNsYTlmWmNhNEk3S2FnQnRnUkduT3c%3D")

src/invidious/channels.cr

@@ -512,31 +512,6 @@ def produce_channel_playlists_url(ucid, cursor, sort = "newest", auto_generated
   return "/browse_ajax?continuation=#{continuation}&gl=US&hl=en"
 end
 
-def extract_channel_playlists_cursor(cursor, auto_generated)
-  cursor = URI.decode_www_form(cursor)
-    .try { |i| Base64.decode(i) }
-    .try { |i| IO::Memory.new(i) }
-    .try { |i| Protodec::Any.parse(i) }
-    .try { |i| i["80226972:0:embedded"]["3:1:base64"].as_h.find { |k, v| k.starts_with? "15:" } }
-    .try &.[1]
-
-  if cursor.try &.as_h?
-    cursor = cursor.try { |i| Protodec::Any.cast_json(i.as_h) }
-      .try { |i| Protodec::Any.from_json(i) }
-      .try { |i| Base64.urlsafe_encode(i) }
-      .try { |i| URI.encode_www_form(i) } || ""
-  else
-    cursor = cursor.try &.as_s || ""
-  end
-
-  if !auto_generated
-    cursor = URI.decode_www_form(cursor)
-      .try { |i| Base64.decode_string(i) }
-  end
-
-  return cursor
-end
-
 # TODO: Add "sort_by"
 def fetch_channel_community(ucid, continuation, locale, format, thin_mode)
   response = YT_POOL.client &.get("/channel/#{ucid}/community?gl=US&hl=en")