Revert "jetbrains: update IDEA for generated plugins"

This reverts commit d851231ee9.

The change went ahead too early and the actual plugin generation system
is not complete.

pkgs/applications/editors/jetbrains/wrapper.nix

@@ -21,13 +21,11 @@ in
 assert assertMsg (length badPlugins == 0) errorMsg;
 
 appendToName "with-plugins" (package.overrideAttrs (oldAttrs: {
-  inherit plugins;
-  # TODO: Remove version from directory name
+  passthru = { inherit plugins; };
+  # TODO: Purely aesthetics, but link the plugin to its name instead of hash-name-version
   installPhase = oldAttrs.installPhase + ''
     for plugin in $plugins; do
-      local dirname=$(basename "$plugin")
-      dirname=''${dirname:33}
-      ln -s "$plugin" "$out/$name/plugins/$dirname"
+      ln -s "$plugin" "$out/$name/plugins/$(basename $plugin)"
     done
   '';
 }))