Use .jpg instead of .jpeg for image/jpeg

Revert "Resolve #795"

This reverts commit d6939b2913.

app/src/main/java/com/hippo/ehviewer/gallery/PageLoader2.java

@@ -28,7 +28,6 @@ public abstract class PageLoader2 extends PageLoader {
     // With dot
     public static final String[] SUPPORT_IMAGE_EXTENSIONS = {
             ".jpg", // Joint Photographic Experts Group
-            ".jpeg",
             ".png", // Portable Network Graphics
             ".gif", // Graphics Interchange Format
     };

app/src/main/java/com/hippo/ehviewer/spider/SpiderQueenWorker.kt

@@ -104,7 +104,6 @@ class SpiderQueenWorker(private val queen: SpiderQueen) : CoroutineScope {
             return queen.updatePageState(index, STATE_FINISHED)
         }
         if (force) {
-            spiderDen.remove(index)
             pTokenLock.withLock {
                 val pToken = spiderInfo.pTokenMap[index]
                 if (pToken == TOKEN_FAILED) spiderInfo.pTokenMap.remove(index)