This comes from package.el

What is it anyways?

init.el

@@ -1,3 +1,9 @@
+;; Added by Package.el.  This must come before configurations of
+;; installed packages.  Don't delete this line.  If you don't want it,
+;; just comment it out by adding a semicolon to the start of the line.
+;; You may delete these explanatory comments.
+(package-initialize)
+
 (custom-set-variables
  ;; custom-set-variables was added by Custom.
  ;; If you edit it by hand, you could mess it up, so be careful.