Remove retired and security branches from active docs (#3882)

diff --git a/Doc/tools/static/version_switch.js b/Doc/tools/static/version_switch.js
index 8b36a61671831da80e6c5ac55d09551b725ecc1d..e8889ebfc41e7a7151468633ec694a7a6e888a56 100644 (file)
--- a/Doc/tools/static/version_switch.js
+++ b/Doc/tools/static/version_switch.js
@@ -5,8 +5,6 @@
     '3.7': 'dev (3.7)',
     '3.6': '3.6',
     '3.5': '3.5',
-    '3.4': '3.4',
-    '3.3': '3.3',
     '2.7': '2.7',
   };