I found a silly tag. It's called javacript
The description is
We don't need it. So why do we want it? Do we want it, or just no mods have seen it (can mods delete tags)?
I just realized from the answers that tags do indeed get deleted if they don't have any questions within 24 hours. Thanks for the information! I will read more (for those interested, it has a question at How can we get rid of misspelled and unused (or "zombie") tags? - thanks DoorknobOfSnow).
[EDIT TO THE EDIT]
I just again realized that there are many zombie tags, such as textbo. But they will all be deleted as shown in the answer to How can we get rid of misspelled and unused (or "zombie") tags?.
If everyone is wondering why those tag links are broken (not yet), it's probably because they are now deleted (because they are zombie tags).