diff --git a/.gitmodules b/.gitmodules
deleted file mode 100644
index 75bf1d9..0000000
--- a/.gitmodules
+++ /dev/null
@@ -1,9 +0,0 @@
-[submodule "benchmark/realworld"]
-	path = benchmark/realworld
-	url = git@github.com:sveltejs/realworld.git
-[submodule "benchmark/realworld-with-glory"]
-	path = benchmark/realworld-with-glory
-	url = git@github.com:sveltejs/realworld.git
-[submodule "benchmark/kit-example"]
-	path = benchmark/kit-example
-	url = https://github.com/sveltejs/kit.git
diff --git a/benchmark/README.md b/benchmark/README.md
deleted file mode 100644
index 1f7d270..0000000
--- a/benchmark/README.md
+++ /dev/null
@@ -1,17 +0,0 @@
-# Benchmark for using glory-svelte-preprocess on existing project
-
-## Result
-
-
-
-## How did I get the file size?
-
-Run the following commands in each repo to get the file size for css and js:
-
-```
-npm install
-npm run build
-dua ./build/**/*.css
-dua ./build/**/*.js
-```
-
diff --git a/benchmark/kit-example b/benchmark/kit-example
deleted file mode 160000
index 0bc6648..0000000
--- a/benchmark/kit-example
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 0bc66484024eafcc7aa6fcc1aebc2ba92e5f129a
diff --git a/benchmark/realworld b/benchmark/realworld
deleted file mode 160000
index d35ef7c..0000000
--- a/benchmark/realworld
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit d35ef7c1cb6f3bc3c3f318ccd58015a37d56ca6e
diff --git a/benchmark/realworld-with-glory b/benchmark/realworld-with-glory
deleted file mode 160000
index d35ef7c..0000000
--- a/benchmark/realworld-with-glory
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit d35ef7c1cb6f3bc3c3f318ccd58015a37d56ca6e
diff --git a/example/src/routes/__layout.svelte b/example/src/routes/__layout.svelte
new file mode 100644
index 0000000..eb04318
--- /dev/null
+++ b/example/src/routes/__layout.svelte
@@ -0,0 +1,8 @@
+<style>
+    .hello{
+        color: red;
+        font-size: 12px;
+    }
+</style>
+
+<slot></slot>
diff --git a/test/transformer.spec.js b/test/transformer.spec.js
index 0610921..07e484c 100644
--- a/test/transformer.spec.js
+++ b/test/transformer.spec.js
@@ -39,39 +39,3 @@ describe("when transforming html", function () {
     );
   });
 });
-
-describe("when transforming CSS", function () {
-  const componentCode = `
-      <style>
-  .foo{
-    color: red;
-  }
-</style>
-<p class="foo">Hello world<p/>`;
-
-  const filename = "/src/index.svelte";
-
-  const classCache = {
-    "/src/__layout.svelte": { bar: { a: true } },
-    [filename]: { foo: { a: true } },
-  };
-
-  const declarationCache = {
-    none: { "color:red;": "a" },
-  };
-
-  describe("when identical declaration is found in __layout.svelte", function () {
-    const ast = parse(componentCode, { filename });
-    const transformer = createTransformer(componentCode, filename).transformCss(
-      ast.css,
-      declarationCache,
-      classCache,
-    );
-
-    it("should remove that declaration found in current component", async () => {
-      expect(transformer.toString().replace(/\s/g, "")).toBe(
-        `<style></style><p class="foo">Hello world<p/>`.replace(/\s/g, "")
-      );
-    });
-  });
-});