Cherry-pick revert 8f65a3d and dc3aec8

Refactor release source logic to simplify platform identification and remove redundant checks

modules/releasesource.groovy

@@ -30,15 +30,7 @@
     def release_ = any {
         def platform = custom_releases.find { idx -> idx.find { known -> fn.lower().contains(known.lower()) } }[0]
         platform = platform.replace(".WEB-DL", "")
-        // sometimes, group may use different keyword like WEBRip instead of WEB-DL
-        // when they do a re-encoding or modification. This logic will try to find the
-        // correct source if stated explicitly in the filename
-        def is_webdl = source.contains("WEB-DL")
-        def src_smart = source ? ".${source}" : ""
-        is_webdl ? "${platform}.WEB-DL" : platform ? "${platform}${src_smart}" : ""
-    } {
-        // if unlised group is BiliIntl, then it's from bilibili
-        unlisted_group == "BiliIntl" ? "BILI.WEB-DL" : ""
+        platform ? "${platform}.WEB-DL" : ""
     } {
         source
     } {