search functions: Don't return result count

This is useless, as the items count can be directly acessed
using the '.size' method, so use that instead when needed.

src/invidious/routes/api/v1/channels.cr

@@ -254,7 +254,7 @@ module Invidious::Routes::API::V1::Channels
     page = env.params.query["page"]?.try &.to_i?
     page ||= 1
 
-    count, search_results = channel_search(query, page, ucid)
+    search_results = channel_search(query, page, ucid)
     JSON.build do |json|
       json.array do
         search_results.each do |item|

src/invidious/routes/api/v1/search.cr

@@ -32,7 +32,7 @@ module Invidious::Routes::API::V1::Search
       return error_json(400, ex)
     end
 
-    count, search_results = search(query, search_params, region).as(Tuple)
+    search_results = search(query, search_params, region)
     JSON.build do |json|
       json.array do
         search_results.each do |item|

src/invidious/routes/playlists.cr

@@ -247,15 +247,13 @@ module Invidious::Routes::Playlists
     query = env.params.query["q"]?
     if query
       begin
-        search_query, count, items, operators = process_search_query(query, page, user, region: nil)
+        search_query, items, operators = process_search_query(query, page, user, region: nil)
         videos = items.select(SearchVideo).map(&.as(SearchVideo))
       rescue ex
         videos = [] of SearchVideo
-        count = 0
       end
     else
       videos = [] of SearchVideo
-      count = 0
     end
 
     env.set "add_playlist_items", plid

src/invidious/routes/search.cr

@@ -54,7 +54,7 @@ module Invidious::Routes::Search
       user = env.get? "user"
 
       begin
-        search_query, count, videos, operators = process_search_query(query, page, user, region: region)
+        search_query, videos, operators = process_search_query(query, page, user, region: region)
       rescue ex : ChannelSearchException
         return error_template(404, "Unable to find channel with id of '#{HTML.escape(ex.channel)}'. Are you sure that's an actual channel id? It should look like 'UC4QobU6STFB0P71PMvOGN5A'.")
       rescue ex