diff --git a/src/wp-admin/includes/class-wp-comments-list-table.php b/src/wp-admin/includes/class-wp-comments-list-table.php
index cb474c3794..08b709b633 100644
--- a/src/wp-admin/includes/class-wp-comments-list-table.php
+++ b/src/wp-admin/includes/class-wp-comments-list-table.php
@@ -519,11 +519,11 @@ class WP_Comments_List_Table extends WP_List_Table {
 		}
 	}
 
-	public function column_date( $comment ) {
+	public function column_date() {
 		return get_comment_date( __( 'Y/m/d \a\t g:ia' ) );
 	}
 
-	public function column_response( $comment ) {
+	public function column_response() {
 		$post = get_post();
 
 		if ( isset( $this->pending_count[$post->ID] ) ) {
diff --git a/src/wp-admin/includes/class-wp-importer.php b/src/wp-admin/includes/class-wp-importer.php
index 77c769c71e..7f2a5e8949 100644
--- a/src/wp-admin/includes/class-wp-importer.php
+++ b/src/wp-admin/includes/class-wp-importer.php
@@ -196,10 +196,9 @@ class WP_Importer {
 	/**
 	 * Bump up the request timeout for http requests
 	 *
-	 * @param int $val
 	 * @return int
 	 */
-	public function bump_request_timeout( $val ) {
+	public function bump_request_timeout() {
 		return 60;
 	}
 
diff --git a/src/wp-admin/includes/class-wp-posts-list-table.php b/src/wp-admin/includes/class-wp-posts-list-table.php
index d88aa16afc..60edd63e65 100644
--- a/src/wp-admin/includes/class-wp-posts-list-table.php
+++ b/src/wp-admin/includes/class-wp-posts-list-table.php
@@ -269,10 +269,9 @@ class WP_Posts_List_Table extends WP_List_Table {
 		/* translators: manage posts column name */
 		$posts_columns['title'] = _x( 'Title', 'column name' );
 
-		if ( post_type_supports( $post_type, 'author' ) )
+		if ( post_type_supports( $post_type, 'author' ) ) {
 			$posts_columns['author'] = __( 'Author' );
-
-		$taxonomies = array();
+		}
 
 		$taxonomies = get_object_taxonomies( $post_type, 'objects' );
 		$taxonomies = wp_filter_object_list( $taxonomies, array( 'show_admin_column' => true ), 'and', 'name' );
diff --git a/src/wp-admin/includes/class-wp-terms-list-table.php b/src/wp-admin/includes/class-wp-terms-list-table.php
index f1d30b2676..61ab9d6b8a 100644
--- a/src/wp-admin/includes/class-wp-terms-list-table.php
+++ b/src/wp-admin/includes/class-wp-terms-list-table.php
@@ -189,7 +189,6 @@ class WP_Terms_List_Table extends WP_List_Table {
 			foreach ( $terms as $term ) {
 				$this->single_row( $term );
 			}
-			$count = $number; // Only displaying a single page.
 		}
 	}
 
diff --git a/src/wp-admin/includes/class-wp-upgrader.php b/src/wp-admin/includes/class-wp-upgrader.php
index ec39f6ad39..20f9e8658e 100644
--- a/src/wp-admin/includes/class-wp-upgrader.php
+++ b/src/wp-admin/includes/class-wp-upgrader.php
@@ -1919,7 +1919,6 @@ class WP_Automatic_Updater {
 	 * @param object $item The update offer.
 	 */
 	protected function send_core_update_notification_email( $item ) {
-		$notify   = true;
 		$notified = get_site_option( 'auto_core_update_notified' );
 
 		// Don't notify if we've already notified the same email address of the same version.