Remove unused variable, use unabbreviated vars, and add void return type

Author: westonruter

tests/phpunit/tests/post/getPosts.php

@@ -169,12 +169,11 @@ public function test_explicit_offset_non_0_should_override_paged() {
 	 *
 	 * @ticket 64813
 	 */
-	public function test_should_accept_query_string_args() {
-		$p1 = self::factory()->post->create();
-		$p2 = self::factory()->post->create();
+	public function test_should_accept_query_string_args(): void {
+		self::factory()->post->create();
+		$second_post_id = self::factory()->post->create();
+		$found_post_ids = get_posts( 'numberposts=1&fields=ids' );
 
-		$found = get_posts( 'numberposts=1&fields=ids' );
-
-		$this->assertSame( array( $p2 ), $found );
+		$this->assertSame( array( $second_post_id ), $found_post_ids );
 	}
 }