Update README.md to remove IE from supporting list

Signed-off-by: Max Wu <[email protected]>

Author: jackycute

README.md

@@ -81,7 +81,7 @@ CodiMD is a service that runs on Node.js, while users use the service through br
 - <img src="https://raw.githubusercontent.com/alrra/browser-logos/master/src/chrome/chrome_48x48.png" alt="Chrome" width="24px" height="24px" /> Chrome >= 47, Chrome for Android >= 47
 - <img src="https://raw.githubusercontent.com/alrra/browser-logos/master/src/safari/safari_48x48.png" alt="Safari" width="24px" height="24px" /> Safari >= 9, iOS Safari >= 8.4
 - <img src="https://raw.githubusercontent.com/alrra/browser-logos/master/src/firefox/firefox_48x48.png" alt="Firefox" width="24px" height="24px" /> Firefox >= 44
-- <img src="https://raw.githubusercontent.com/alrra/browser-logos/master/src/edge/edge_48x48.png" alt="IE / Edge" width="24px" height="24px" /> IE >= 9, Edge >= 12
+- <img src="https://raw.githubusercontent.com/alrra/browser-logos/master/src/edge/edge_48x48.png" alt="Edge" width="24px" height="24px" /> Edge >= 12
 - <img src="https://raw.githubusercontent.com/alrra/browser-logos/master/src/opera/opera_48x48.png" alt="Opera" width="24px" height="24px" /> Opera >= 34, Opera Mini not supported
 - Android Browser >= 4.4