Remove __cfduid cookie check

As per email:

Cloudflare is deprecating the __cfduid cookie and the cf-request-id headers. The __cfduid cookie will be removed on 10 May 2021 and the cf-request-id headers will be removed on 1 July. We expect that most customers will not have to take action as a result of this removal. [...] Starting on 10 May 2021, we will stop adding a “Set-Cookie” header on all HTTP responses. The last __cfduid cookies will expire 30 days after that.

app/src/main/java/eu/kanade/tachiyomi/network/CloudflareInterceptor.kt

@@ -171,6 +171,6 @@ class CloudflareInterceptor(private val context: Context) : Interceptor {
 
     companion object {
         private val SERVER_CHECK = arrayOf("cloudflare-nginx", "cloudflare")
-        private val COOKIE_NAMES = listOf("__cfduid", "cf_clearance")
+        private val COOKIE_NAMES = listOf("cf_clearance")
     }
 }