Remove EMPTY_GALLERY_TAG_GROUP_ARRAY

There is no reason to keep it
emptyList() always return a singleton

app/src/main/kotlin/com/hippo/ehviewer/client/parser/GalleryDetailParser.kt

@@ -76,7 +76,6 @@ object GalleryDetailParser {
     private val PATTERN_NEWER_DATE = Regex(", added (.+?)<br />")
     private val PATTERN_FAVORITE_SLOT =
         Regex("/fav.png\\); background-position:0px -(\\d+)px")
-    private val EMPTY_GALLERY_TAG_GROUP_ARRAY = emptyList<GalleryTagGroup>()
     private val EMPTY_GALLERY_COMMENT_ARRAY = GalleryCommentList(emptyList(), false)
     private val WEB_COMMENT_DATE_FORMAT = DateTimeFormatter
         .ofPattern("dd MMMM yyyy, HH:mm", Locale.US).withZone(ZoneOffset.UTC)
@@ -316,7 +315,7 @@ object GalleryDetailParser {
         } catch (e: Throwable) {
             ExceptionUtils.throwIfFatal(e)
             e.printStackTrace()
-            EMPTY_GALLERY_TAG_GROUP_ARRAY
+            emptyList()
         }
     }
 
@@ -326,7 +325,7 @@ object GalleryDetailParser {
         } catch (e: Throwable) {
             ExceptionUtils.throwIfFatal(e)
             e.printStackTrace()
-            EMPTY_GALLERY_TAG_GROUP_ARRAY
+            emptyList()
         }
     }