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diff --git a/src/docs/mutex_integer.txt b/src/docs/mutex_integer.txt
deleted file mode 100644
index f9dbdfb904c..00000000000
--- a/src/docs/mutex_integer.txt
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@@ -1,22 +0,0 @@
-### What it does
-Checks for usages of `Mutex<X>` where `X` is an integral
-type.
-
-### Why is this bad?
-Using a mutex just to make access to a plain integer
-sequential is
-shooting flies with cannons. `std::sync::atomic::AtomicUsize` is leaner and faster.
-
-### Known problems
-This lint cannot detect if the mutex is actually used
-for waiting before a critical section.
-
-### Example
-```
-let x = Mutex::new(0usize);
-```
-
-Use instead:
-```
-let x = AtomicUsize::new(0usize);
-```
\ No newline at end of file