diff --git a/hello1.txt b/hello1.txt
deleted file mode 100644
index 980a0d5f19..0000000000
--- a/hello1.txt
+++ /dev/null
@@ -1 +0,0 @@
-Hello World!
diff --git a/output.txt b/output.txt
deleted file mode 100644
index d00491fd7e..0000000000
--- a/output.txt
+++ /dev/null
@@ -1 +0,0 @@
-1
diff --git a/test.memo.stdout.x b/test.memo.stdout.x
deleted file mode 100644
index 62d8fe9f6d..0000000000
--- a/test.memo.stdout.x
+++ /dev/null
@@ -1 +0,0 @@
-X