diff --git a/doc/ScrumPPT.pdf b/doc/ScrumPPT.pdf
deleted file mode 100644
index f8ef1b3..0000000
Binary files a/doc/ScrumPPT.pdf and /dev/null differ
diff --git a/doc/test.md b/doc/test.md
deleted file mode 100644
index b6fc4c6..0000000
--- a/doc/test.md
+++ /dev/null
@@ -1 +0,0 @@
-hello
\ No newline at end of file
diff --git a/doc/test2.md b/doc/test2.md
deleted file mode 100644
index 5283838..0000000
--- a/doc/test2.md
+++ /dev/null
@@ -1 +0,0 @@
-我是shab
diff --git a/doc/test3.md b/doc/test3.md
deleted file mode 100644
index 8939daa..0000000
--- a/doc/test3.md
+++ /dev/null
@@ -1 +0,0 @@
-hello world！
\ No newline at end of file
diff --git a/doc/test4 b/doc/test4
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index 51334ce..0000000
--- a/doc/test4
+++ /dev/null
@@ -1 +0,0 @@
-This is test4