This is a Delete Document icon. We've made it in iOS style, first introduced in iOS version 7 and supported in all later releases up until now (at least iOS 11). This style is based on thin two-pixel lines and is optimized for 50x50 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 12,600 icons, all in the same style and quality.
This is a stylized drawing of a computer or phone screen. There is a box with lines of type inside. At the bottom of the screen breaking the lines the box there is a delete icon, which is the letter X encircled.