Remove submodule checkout from spike workflow

The spike only needs fusepy + FUSE backend, not the AmiFUSE codebase.
Submodule checkout fails because the amitools fork is not public.

Author: tbdye

.github/workflows/fuse-t-spike.yml

@@ -11,8 +11,6 @@ jobs:
     runs-on: macos-latest
     steps:
       - uses: actions/checkout@v4
-        with:
-          submodules: true
 
       - name: Set up Python 3.13
         uses: actions/setup-python@v5
@@ -116,8 +114,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-        with:
-          submodules: true
 
       - name: Set up Python 3.13
         uses: actions/setup-python@v5
@@ -218,8 +214,6 @@ jobs:
     runs-on: windows-latest
     steps:
       - uses: actions/checkout@v4
-        with:
-          submodules: true
 
       - name: Set up Python 3.13
         uses: actions/setup-python@v5