Revert "chore: use hermit in goose" (#2759)

bin/activate-hermit.fish

@@ -1,24 +0,0 @@
-#!/usr/bin/env fish
-
-# This file must be sourced with "source bin/activate-hermit.fish" from Fish shell.
-# You cannot run it directly.
-#
-# THIS FILE IS GENERATED; DO NOT MODIFY
-
-if status is-interactive
-    set BIN_DIR (dirname (status --current-filename))
-
-    if "$BIN_DIR/hermit" noop > /dev/null
-        # Source the activation script generated by Hermit
-        "$BIN_DIR/hermit" activate "$BIN_DIR/.." | source
-
-        # Clear the command cache if applicable
-        functions -c > /dev/null 2>&1
-
-        # Display activation message
-        echo "Hermit environment $($HERMIT_ENV/bin/hermit env HERMIT_ENV) activated"
-    end
-else
-    echo "You must source this script: source $argv[0]" >&2
-    exit 33
-end