Revert "feat(shim): Add another alternative shim written in rust (#4229)" (#4553)

This reverts commit 5ad8c76.

Co-authored-by: Zoritle <66551926+zoritle@users.noreply.github.com>

Author: niheaven

lib/core.ps1

@@ -619,7 +619,6 @@ function get_shim_path() {
     switch ($shim_version) {
         '71' { $shim_path = "$(versiondir 'scoop' 'current')\supporting\shims\71\shim.exe"; Break }
         'kiennq' { $shim_path = "$(versiondir 'scoop' 'current')\supporting\shims\kiennq\shim.exe"; Break }
-        'rshim' { $shim_path = "$(versiondir 'scoop' 'current')\supporting\shims\rshim\shim.exe"; Break }
         'default' { Break }
         default { warn "Unknown shim version: '$shim_version'" }
     }