diff --git a/CHANGELOG.md b/CHANGELOG.md
index 55baa5728d..8ad64cd307 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,5 @@
 ### HEAD
+* Remove ConditionalTagCheck class ([#1494](https://github.com/roots/sage/pull/1494))
 * Add search templates ([#1459](https://github.com/roots/sage/issues/1459))
 * Allow `debugger` statements in development JavaScript ([#1487](https://github.com/roots/sage/issues/1487))
 
diff --git a/functions.php b/functions.php
index bfb84adeda..73534fef86 100644
--- a/functions.php
+++ b/functions.php
@@ -13,7 +13,6 @@
   'lib/utils.php',                 // Utility functions
   'lib/init.php',                  // Initial theme setup and constants
   'lib/wrapper.php',               // Theme wrapper class
-  'lib/conditional-tag-check.php', // ConditionalTagCheck class
   'lib/config.php',                // Configuration
   'lib/assets.php',                // Scripts and stylesheets
   'lib/titles.php',                // Page titles
diff --git a/lib/conditional-tag-check.php b/lib/conditional-tag-check.php
deleted file mode 100644
index 61f53b6f16..0000000000
--- a/lib/conditional-tag-check.php
+++ /dev/null
@@ -1,43 +0,0 @@
-<?php
-
-namespace Roots\Sage;
-
-/**
- * Utility class which takes an array of conditional tags (or any function which returns a boolean)
- * and returns `false` if *any* of them are `true`, and `true` otherwise.
- *
- * @param array list of conditional tags (http://codex.wordpress.org/Conditional_Tags)
- *        or custom function which returns a boolean
- *
- * @return boolean
- */
-class ConditionalTagCheck {
-  private $conditionals;
-
-  public $result = true;
-
-  public function __construct($conditionals = []) {
-    $this->conditionals = $conditionals;
-
-    $conditionals = array_map([$this, 'checkConditionalTag'], $this->conditionals);
-
-    if (in_array(true, $conditionals)) {
-      $this->result = false;
-    }
-  }
-
-  private function checkConditionalTag($conditional) {
-    if (is_array($conditional)) {
-      list($tag, $args) = $conditional;
-    } else {
-      $tag = $conditional;
-      $args = false;
-    }
-
-    if (function_exists($tag)) {
-      return $args ? $tag($args) : $tag();
-    } else {
-      return false;
-    }
-  }
-}
diff --git a/lib/config.php b/lib/config.php
index 20c16bc8d0..e0919f2c56 100644
--- a/lib/config.php
+++ b/lib/config.php
@@ -28,38 +28,18 @@
 }
 
 /**
- * Define which pages shouldn't have the sidebar
+ * Determine which pages should NOT display the sidebar
  */
 function display_sidebar() {
   static $display;
 
-  if (!isset($display)) {
-    $conditionalCheck = new ConditionalTagCheck(
-      /**
-       * Any of these conditional tags that return true won't show the sidebar.
-       * You can also specify your own custom function as long as it returns a boolean.
-       *
-       * To use a function that accepts arguments, use an array instead of just the function name as a string.
-       *
-       * Examples:
-       *
-       * 'is_single'
-       * 'is_archive'
-       * ['is_page', 'about-me']
-       * ['is_tax', ['flavor', 'mild']]
-       * ['is_page_template', 'about.php']
-       * ['is_post_type_archive', ['foo', 'bar', 'baz']]
-       *
-       */
-      [
-        'is_404',
-        'is_front_page',
-        ['is_page_template', 'template-custom.php']
-      ]
-    );
+  isset($display) || $display = !in_array(true, [
+    // The sidebar will NOT be displayed if ANY of the following return true.
+    // @link https://codex.wordpress.org/Conditional_Tags
+    is_404(),
+    is_front_page(),
+    is_page_template('template-custom.php'),
+  ]);
 
-    $display = apply_filters('sage/display_sidebar', $conditionalCheck->result);
-  }
-
-  return $display;
+  return apply_filters('sage/display_sidebar', $display);
 }