diff --git a/README.md b/README.md
index 357c4b642..123ea24f1 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,6 @@
 ## Table of Contents
 
 ### Array
-* [Array concatenation](#array-concatenation)
 * [Array difference](#array-difference)
 * [Array intersection](#array-intersection)
 * [Array remove](#array-remove)
@@ -133,17 +132,6 @@
 
 ## Array
 
-### Array concatenation
-
-Use Array spread operators (`...`) to concatenate an array with any additional arrays and/or values, specified in `args`.
-
-```js
-const ArrayConcat = (arr, ...args) => [...arr,...args]; 
-// ArrayConcat([1], [1, 2, 3, [4]]) -> [1, 1, 2, 3, [4]]
-```
-
-[⬆ back to top](#table-of-contents)
-
 ### Array difference
 
 Create a `Set` from `b`, then use `Array.filter()` on `a` to only keep values not contained in `b`.
diff --git a/snippets/array-concatenation.md b/snippets/array-concatenation.md
deleted file mode 100644
index 4c337c9e9..000000000
--- a/snippets/array-concatenation.md
+++ /dev/null
@@ -1,8 +0,0 @@
-### Array concatenation
-
-Use Array spread operators (`...`) to concatenate an array with any additional arrays and/or values, specified in `args`.
-
-```js
-const ArrayConcat = (arr, ...args) => [...arr,...args]; 
-// ArrayConcat([1], [1, 2, 3, [4]]) -> [1, 1, 2, 3, [4]]
-```
diff --git a/tag_database b/tag_database
index 8181032df..ac64d168d 100644
--- a/tag_database
+++ b/tag_database
@@ -1,6 +1,5 @@
 3-digit-hexcode-to-6-digit-hexcode:utility
 anagrams-of-string-(with-duplicates):string
-array-concatenation:array
 array-difference:array
 array-intersection:array
 array-remove:array