Remove Folder.delete(boolean)

app/core/src/main/java/com/fsck/k9/mailstore/LocalFolder.java

@@ -1899,7 +1899,6 @@ public class LocalFolder extends Folder<LocalMessage> {
         setVisibleLimit(getAccount().getDisplayCount());
     }
 
-    @Override
     public void delete(final boolean recurse) throws MessagingException {
         try {
             this.localStore.getDatabase().execute(false, new DbCallback<Void>() {

mail/common/src/main/java/com/fsck/k9/mail/Folder.java

@@ -138,8 +138,6 @@ public abstract class Folder<T extends Message> {
         Timber.d("fetchPart() not implemented.");
     }
 
-    public abstract void delete(boolean recurse) throws MessagingException;
-
     public abstract String getServerId();
 
     public abstract String getName();

mail/protocols/imap/src/main/java/com/fsck/k9/mail/store/imap/ImapFolder.java

@@ -485,11 +485,6 @@ public class ImapFolder extends Folder<ImapMessage> {
         return uids.get(0);
     }
 
-    @Override
-    public void delete(boolean recurse) throws MessagingException {
-        throw new Error("ImapFolder.delete() not yet implemented");
-    }
-
     @Override
     public ImapMessage getMessage(String uid) throws MessagingException {
         return new ImapMessage(uid, this);

mail/protocols/imap/src/test/java/com/fsck/k9/mail/store/imap/ImapFolderTest.java

@@ -1102,13 +1102,6 @@ public class ImapFolderTest {
         }
     }
 
-    @Test(expected = Error.class)
-    public void delete_notImplemented() throws Exception {
-        ImapFolder folder = createFolder("Folder");
-
-        folder.delete(false);
-    }
-
     @Test
     public void getMessageByUid_returnsNewImapMessageWithUidInFolder() throws Exception {
         ImapFolder folder = createFolder("Folder");

mail/protocols/pop3/src/main/java/com/fsck/k9/mail/store/pop3/Pop3Folder.java

@@ -523,10 +523,6 @@ public class Pop3Folder extends Folder<Pop3Message> {
         return null;
     }
 
-    @Override
-    public void delete(boolean recurse) throws MessagingException {
-    }
-
     @Override
     public void delete(List<? extends Message> msgs, String trashFolder) throws MessagingException {
         setFlags(msgs, Collections.singleton(Flag.DELETED), true);

mail/protocols/webdav/src/main/java/com/fsck/k9/mail/store/webdav/WebDavFolder.java

@@ -221,11 +221,6 @@ public class WebDavFolder extends Folder<WebDavMessage> {
         return true;
     }
 
-    @Override
-    public void delete(boolean recursive) throws MessagingException {
-        throw new Error("WebDavFolder.delete() not implemeneted");
-    }
-
     @Override
     public WebDavMessage getMessage(String uid) throws MessagingException {
         return new WebDavMessage(uid, this);