remove a done todo

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "hedu"
-version = "0.1.0"
+version = "0.1.1"
 edition = "2021"
 publish = true
 authors = ["Christoph J. Scherr <software@cscherr.de>"]

src/main.rs

@@ -86,7 +86,6 @@ pub struct Cli {
     /// a data source, probably a file.
     ///
     /// If left empty or set as "-", the program will read from stdin.
-    // TODO: take many sources #60
     pub data_source: Vec<String>,
 }