Remove useless code

app/src/main/java/com/hippo/ehviewer/client/EhUrl.java

@@ -17,13 +17,10 @@
 package com.hippo.ehviewer.client;
 
 import android.support.annotation.NonNull;
-import android.util.Pair;
 import com.hippo.ehviewer.Settings;
 import com.hippo.network.UrlBuilder;
 import java.util.List;
 import java.util.ListIterator;
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
 import okhttp3.HttpUrl;
 
 public class EhUrl {
@@ -58,8 +55,6 @@ public class EhUrl {
     private static final String URL_PREFIX_THUMB_E = "https://ehgt.org/t/";
     private static final String URL_PREFIX_THUMB_EX = "https://exhentai.org/t/";
 
-    public static final Pattern PATTERN_DETAIL_URL = Pattern.compile("(?:g|mpv)/(\\d+)/([0-9a-f]{10})");
-
     public static String getGalleryDetailUrl(long gid, String token) {
         return getGalleryDetailUrl(gid, token, 0, false);
     }
@@ -181,13 +176,4 @@ public class EhUrl {
             return originUrl;
         }
     }
-
-    public static Pair<Long, String> parseGalleryDetailUrl(String url) {
-        Matcher matcher = PATTERN_DETAIL_URL.matcher(url);
-        if (matcher.find()) {
-            return new Pair<>(Long.parseLong(matcher.group(1)), matcher.group(2));
-        } else {
-            return null;
-        }
-    }
 }