Remove test-gadget from submission

.test-gadget/auth_token

@@ -1 +0,0 @@
-c7cf8994-380d-40c9-b8b9-be52ae7e92e7

.test-gadget/course.json

@@ -1,3 +0,0 @@
-{
-  "server_base_url": "https://test-gadget.compilers.how"
-}

.test-gadget/last_submission_id.txt

@@ -1 +0,0 @@
-3dd0c210-4c98-49fc-aa2f-187425635164

test-gadget.py

@@ -1,31 +0,0 @@
-#!/usr/bin/env python3
-# Runs the correct test-gadget client program in .test-gadget/test-gadget-client-$PLATFORM
-
-import os
-import platform
-import sys
-from pathlib import Path
-
-
-def get_platform_binary() -> str:
-    system = platform.system().lower()
-    if system == "darwin":
-        return "test-gadget-client-macos"
-    elif system == "windows":
-        return "test-gadget-client-windows.exe"
-    elif system == "linux":
-        return "test-gadget-client-linux"
-    else:
-        print(f"Unsupported platform: {system}", file=sys.stderr)
-        sys.exit(1)
-
-
-script_dir = Path(__file__).parent
-dist_dir = script_dir / ".test-gadget"
-binary = dist_dir / get_platform_binary()
-
-if not binary.exists():
-    print(f"Program not found: {binary}", file=sys.stderr)
-    sys.exit(1)
-
-os.execv(str(binary), [str(binary)] + sys.argv[1:])