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diff --git a/src/docs/suspicious_map.txt b/src/docs/suspicious_map.txt
deleted file mode 100644
index d8fa52c43fb..00000000000
--- a/src/docs/suspicious_map.txt
+++ /dev/null
@@ -1,13 +0,0 @@
-### What it does
-Checks for calls to `map` followed by a `count`.
-
-### Why is this bad?
-It looks suspicious. Maybe `map` was confused with `filter`.
-If the `map` call is intentional, this should be rewritten
-using `inspect`. Or, if you intend to drive the iterator to
-completion, you can just use `for_each` instead.
-
-### Example
-```
-let _ = (0..3).map(|x| x + 2).count();
-```
\ No newline at end of file