diff --git a/src/main/java/matrix/ListMatrix.java b/src/main/java/matrix/ListMatrix.java
index 990ffa8cf1891a6b2e6086d7561645fd8b7467de..a3a4e7d562c43dded22737a89919f85f5eca6040 100644
--- a/src/main/java/matrix/ListMatrix.java
+++ b/src/main/java/matrix/ListMatrix.java
@@ -60,9 +60,4 @@ public class ListMatrix<T> implements Matrix<T> {
     // TODO
   }
 
-  public Matrix<T> subMatrix(Coordinate corner, int width, int height) {
-    // TODO
-    return this;
-  }
-
 }