Cant delete this pm

I know what the glitch is and how to do it. Just want this pm delete but I cant. Any suggestions?

(Whited out private info)

 

[Shin]

Have you tried clicking on the box to the right, scrolling down to the bottom and selecting the "delete" option?

 

Have you tried clicking on the box to the right, scrolling down to the bottom and selecting the "delete" option?

Where is this mighty delete option? I looked for it but cant find it:/

 

Nvm found it