diff --git a/example-transformers/update-mutable-node/source.js b/example-transformers/update-mutable-node/source.js
deleted file mode 100644
index 434da1d..0000000
--- a/example-transformers/update-mutable-node/source.js
+++ /dev/null
@@ -1 +0,0 @@
-const hello = true;
diff --git a/example-transformers/update-mutable-node/source.ts b/example-transformers/update-mutable-node/source.ts
deleted file mode 100644
index 434da1d..0000000
--- a/example-transformers/update-mutable-node/source.ts
+++ /dev/null
@@ -1 +0,0 @@
-const hello = true;
diff --git a/example-transformers/update-mutable-node/transformed/source.js b/example-transformers/update-mutable-node/transformed/source.js
deleted file mode 100644
index 9200be9..0000000
--- a/example-transformers/update-mutable-node/transformed/source.js
+++ /dev/null
@@ -1 +0,0 @@
-const hello = "mutable-world";
diff --git a/example-transformers/update-mutable-node/transformer.js b/example-transformers/update-mutable-node/transformer.js
deleted file mode 100644
index 91ad983..0000000
--- a/example-transformers/update-mutable-node/transformer.js
+++ /dev/null
@@ -1,15 +0,0 @@
-import * as ts from 'typescript';
-const transformer = context => {
-    return sourceFile => {
-        const visitor = (node) => {
-            if (ts.isVariableDeclaration(node)) {
-                const newNode = ts.getMutableClone(node);
-                newNode.initializer = ts.createStringLiteral('mutable-world');
-                return newNode;
-            }
-            return ts.visitEachChild(node, visitor, context);
-        };
-        return ts.visitNode(sourceFile, visitor);
-    };
-};
-export default transformer;
diff --git a/example-transformers/update-mutable-node/transformer.ts b/example-transformers/update-mutable-node/transformer.ts
deleted file mode 100644
index 7247cf5..0000000
--- a/example-transformers/update-mutable-node/transformer.ts
+++ /dev/null
@@ -1,19 +0,0 @@
-import * as ts from 'typescript';
-
-const transformer: ts.TransformerFactory<ts.SourceFile> = context => {
-  return sourceFile => {
-    const visitor = (node: ts.Node): ts.Node => {
-      if (ts.isVariableDeclaration(node)) {
-        const newNode = ts.getMutableClone(node) as ts.VariableDeclaration;
-        newNode.initializer = ts.createStringLiteral('mutable-world');
-        return newNode;
-      }
-
-      return ts.visitEachChild(node, visitor, context);
-    };
-
-    return ts.visitNode(sourceFile, visitor);
-  };
-};
-
-export default transformer;
diff --git a/example-transformers/update-mutable-node/tsconfig.json b/example-transformers/update-mutable-node/tsconfig.json
deleted file mode 100644
index 96baf2a..0000000
--- a/example-transformers/update-mutable-node/tsconfig.json
+++ /dev/null
@@ -1,8 +0,0 @@
-{
-  "extends": "../tsconfig.json",
-  "compilerOptions": {
-    "outDir": "transformed",
-    "plugins": [{ "transform": "./transformer.ts", "type": "raw" }]
-  },
-  "files": ["source.ts"]
-}