Update README

Author: minad

README.org

@@ -1,8 +1,6 @@
 #+TITLE: Gnuplot for Emacs
 
 #+html: <a href="https://www.gnu.org/software/emacs/"><img alt="GNU Emacs" src="https://github.com/minad/corfu/blob/screenshots/emacs.svg?raw=true"/></a>
-#+html: <a href="https://elpa.nongnu.org/nongnu/gnuplot.html"><img alt="NonGNU ELPA" src="https://elpa.nongnu.org/nongnu/gnuplot.svg"/></a>
-#+html: <a href="https://elpa.nongnu.org/nongnu-devel/gnuplot.html"><img alt="NonGNU-devel ELPA" src="https://elpa.nongnu.org/nongnu-devel/gnuplot.svg"/></a>
 #+html: <a href="https://melpa.org/#/gnuplot"><img alt="MELPA" src="https://melpa.org/packages/gnuplot-badge.svg"/></a>
 #+html: <a href="https://stable.melpa.org/#/gnuplot"><img alt="MELPA Stable" src="https://stable.melpa.org/packages/gnuplot-badge.svg"/></a>
 
@@ -20,9 +18,8 @@ above.
 
 * Installation
 
-The easiest way to install =gnuplot= is to directly get it from [[https://elpa.nongnu.org/][NonGNU ELPA]] or
-[[https://melpa.org][MELPA]]. After configuring Emacs to use MELPA, you should be able to install
-=gnuplot= by typing
+The easiest way to install =gnuplot= is to directly get it from [[https://melpa.org][MELPA]]. After
+configuring Emacs to use MELPA, you should be able to install =gnuplot= by typing
 
 : M-x install-package RET gnuplot RET