delete Cargo.lock file

..gitignore.~undo-tree~

@@ -0,0 +1,5 @@
+(undo-tree-save-format-version . 1)
+"c3532e7193831ff41df678e9bbd90906765b1374"
+[nil nil nil nil (25202 59981 613431 521000) 0 nil]
+([nil current ((10 . 20) (9 . 10) (t 25186 11860 131806 328000)) nil (25202 59981 613425 708000) 0 nil])
+nil

.gitignore

@@ -1 +1,3 @@
 /target
+
+Cargo.lock