unattended_install: Remove the hack to get ks from providers

This hack was added in a144934 to allow
spice team to override the stock kickstart files, but it is actually a
backdoor which picks the first matching file from any provider, no
matter which provider is actually being used.

Let's disallow this behavior and ask people to submit their files to the
main repository.

Signed-off-by: Lukáš Doktor <[email protected]>

virttest/tests/unattended_install.py

@@ -176,32 +176,9 @@ def __init__(self, test, params, vm):
         self.tmpdir = test.tmpdir
         self.qemu_img_binary = utils_misc.get_qemu_img_binary(params)
 
-        def get_unattended_file(backend):
-            providers = asset.get_test_provider_names(backend)
-            if not providers:
-                return
-            for provider_name in providers:
-                provider_info = asset.get_test_provider_info(provider_name)
-                if backend not in provider_info["backends"]:
-                    continue
-                if "path" not in provider_info["backends"][backend]:
-                    continue
-                path = provider_info["backends"][backend]["path"]
-                tp_unattended_file = os.path.join(path, self.unattended_file)
-                if os.path.exists(tp_unattended_file):
-                    # Using unattended_file from test-provider
-                    unattended_file = tp_unattended_file
-                    # Take the first matched
-                    return unattended_file
-
         if getattr(self, 'unattended_file'):
             # Fail-back to general unattended_file
             unattended_file = os.path.join(test.virtdir, self.unattended_file)
-            for backend in asset.get_known_backends():
-                found_file = get_unattended_file(backend)
-                if found_file:
-                    unattended_file = found_file
-                    break
             self.unattended_file = unattended_file
 
         if params.get('use_ovmf_autounattend'):