Removed previous/next navigation

app/src/main/java/eu/faircode/email/ViewModelMessages.java

@@ -1,36 +0,0 @@
-package eu.faircode.email;
-
-import androidx.lifecycle.ViewModel;
-import androidx.paging.PagedList;
-
-public class ViewModelMessages extends ViewModel {
-    private PagedList<TupleMessageEx> messages = null;
-
-    void setMessages(PagedList<TupleMessageEx> messages) {
-        this.messages = messages;
-    }
-
-    String[] getPrevNext(String thread) {
-        if (messages == null)
-            return new String[]{null, null};
-
-        boolean found = false;
-        TupleMessageEx prev = null;
-        TupleMessageEx next = null;
-        for (int i = 0; i < messages.size(); i++) {
-            TupleMessageEx item = messages.get(i);
-            if (item == null)
-                continue;
-            if (found) {
-                next = item;
-                messages.loadAround(i);
-                break;
-            }
-            if (thread.equals(item.thread))
-                found = true;
-            else
-                prev = item;
-        }
-        return new String[]{prev == null ? null : prev.thread, next == null ? null : next.thread};
-    }
-}