Merge pull request matplotlib#22263 from jklymak/doc-version-switcher-condense

DOC: condense version switcher

Author: timhoffm

doc/_static/switcher.json

@@ -1,105 +1,22 @@
 [
     {
-        "name": "3.5.1 (stable)",
+        "name": "3.5 (stable)",
         "version": "stable"
     },
     {
-        "name": "3.6 (devdocs)",
+        "name": "3.6 (dev)",
         "version": "devdocs"
     },
     {
-        "version": "3.5.0"
-    },
-    {
+        "name": "3.4",
         "version": "3.4.3"
     },
     {
-        "version": "3.4.2"
-    },
-    {
-        "version": "3.4.1"
-    },
-    {
-        "version": "3.4.0"
-    },
-    {
+        "name": "3.3",
         "version": "3.3.4"
     },
-    {
-        "version": "3.3.3"
-    },
-    {
-        "version": "3.3.2"
-    },
-    {
-        "version": "3.3.1"
-    },
-    {
-        "version": "3.3.0"
-    },
-    {
-        "version": "3.2.2"
-    },
-    {
-        "version": "3.2.1"
-    },
-    {
-        "version": "3.2.0"
-    },
-    {
-        "version": "3.1.3"
-    },
-    {
-        "version": "3.1.2"
-    },
-    {
-        "version": "3.1.1"
-    },
-    {
-        "version": "3.1.0"
-    },
-    {
-        "version": "3.0.3"
-    },
-    {
-        "version": "3.0.2"
-    },
-    {
-        "version": "3.0.1"
-    },
-    {
-        "version": "3.0.0"
-    },
     {
         "name": "2.2",
         "version": "2.2.4"
     },
-    {
-        "name": "2.1",
-        "version": "2.1.2"
-    },
-    {
-        "name": "2.0",
-        "version": "2.0.2"
-    },
-    {
-        "name": "1.5",
-        "version": "1.5.3"
-    },
-    {
-        "name": "1.5",
-        "version": "1.5.3"
-    },
-    {
-        "name": "1.4",
-        "version": "1.4.3"
-    },
-    {
-        "name": "1.3",
-        "version": "1.3.1"
-    },
-    {
-        "name": "1.2",
-        "version": "1.2.1"
-    }
 ]