diff --git a/Cargo.toml b/Cargo.toml
index e078d4c..9125f23 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -41,11 +41,6 @@ nightly_const_generics = []
 # an experimental impl only for now.
 experimental_write_impl = []
 
-# EXPERIMENTAL: Not part of SemVer. This adds an "ArraySet" type which is
-# an array backed set type for situations where you need a set of a known
-# small size without allocation.
-experimental_array_set = []
-
 [package.metadata.docs.rs]
 all-features = true
 
diff --git a/src/arrayset.rs b/src-backup/arrayset.rs
similarity index 100%
rename from src/arrayset.rs
rename to src-backup/arrayset.rs