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diff --git a/src/docs/useless_format.txt b/src/docs/useless_format.txt
deleted file mode 100644
index eb4819da1e9..00000000000
--- a/src/docs/useless_format.txt
+++ /dev/null
@@ -1,22 +0,0 @@
-### What it does
-Checks for the use of `format!("string literal with no
-argument")` and `format!("{}", foo)` where `foo` is a string.
-
-### Why is this bad?
-There is no point of doing that. `format!("foo")` can
-be replaced by `"foo".to_owned()` if you really need a `String`. The even
-worse `&format!("foo")` is often encountered in the wild. `format!("{}",
-foo)` can be replaced by `foo.clone()` if `foo: String` or `foo.to_owned()`
-if `foo: &str`.
-
-### Examples
-```
-let foo = "foo";
-format!("{}", foo);
-```
-
-Use instead:
-```
-let foo = "foo";
-foo.to_owned();
-```
\ No newline at end of file