BREAKING: remove deprecated files config (#25535)

The long form "files" config has been flattened into the parent.

Old:

```json
{
  "test": {
    "files": {
      "include": ["**/*.ts"],
      "exclude": ["ignore.ts"]
    }
  }
}
```

New:

```json
{
  "test": {
    "include": ["**/*.ts"],
    "exclude": ["ignore.ts"]
  }
}
```

This was deprecated some time ago, but we're removing it now in Deno
2.0.

Closes #25415

1 files changed, 0 insertions, 6 deletions

diff --git a/tests/integration/test_tests.rs b/tests/integration/test_tests.rs
index d3c9f0009..f6c48654d 100644
--- a/tests/integration/test_tests.rs
+++ b/tests/integration/test_tests.rs
@@ -124,12 +124,6 @@ itest!(test_with_config2 {
   output: "test/collect2.out",
 });
 
-itest!(test_with_deprecated_config {
-  args: "test --config test/collect/deno.deprecated.jsonc test/collect",
-  exit_code: 0,
-  output: "test/collect.deprecated.out",
-});
-
 itest!(test_with_malformed_config {
   args: "test --config test/collect/deno.malformed.jsonc",
   exit_code: 1,