diff --git a/core/misc/states.es6.js b/core/misc/states.es6.js
index ff958b7568..2274874f90 100644
--- a/core/misc/states.es6.js
+++ b/core/misc/states.es6.js
@@ -648,30 +648,6 @@
    * implement any logic that is particular to states.
    */
 
-  /**
-   * Bitwise AND with a third undefined state.
-   *
-   * @function Drupal.states~ternary
-   *
-   * @param {*} a
-   *   Value a.
-   * @param {*} b
-   *   Value b
-   *
-   * @return {bool}
-   *   The result.
-   */
-  function ternary(a, b) {
-    if (typeof a === 'undefined') {
-      return b;
-    }
-    else if (typeof b === 'undefined') {
-      return a;
-    }
-
-    return a && b;
-  }
-
   /**
    * Inverts a (if it's not undefined) when invertState is true.
    *
diff --git a/core/misc/states.js b/core/misc/states.js
index 07a5fd67ed..2d1d84df31 100644
--- a/core/misc/states.js
+++ b/core/misc/states.js
@@ -346,16 +346,6 @@
     }
   });
 
-  function ternary(a, b) {
-    if (typeof a === 'undefined') {
-      return b;
-    } else if (typeof b === 'undefined') {
-      return a;
-    }
-
-    return a && b;
-  }
-
   function invert(a, invertState) {
     return invertState && typeof a !== 'undefined' ? !a : a;
   }