Twenty Fifteen: Simplify Code for h1 on Blog Index Page when Front Page is in Use

[davidakennedy]

In Twenty Fifteen, there is a chunk of code that creates a h1 for the blog index page when a page is in use for the front page. This is the main h1 of the page, and hidden visually as it mainly serves screen reader users. This code is:

<?php if ( is_home() && ! is_front_page() ) : ?>
	<header>
		<h1 class="page-title screen-reader-text"><?php echo esc_html( get_the_title( get_option( 'page_for_posts' ) ) ); ?></h1>
	</header>
<?php endif; ?>

In thinking about this, I realized my original code could be much simpler:

<?php if ( is_home() && ! is_front_page() ) : ?>
	<header>
		<h1 class="page-title screen-reader-text"><?php single_post_title(); ?></h1>
	</header>
<?php endif; ?>

That template tag is great to use here because it's outside the loop and simplifies the code.

[davidakennedy]

Simplify code for visually hidden h1 on blog index page.

[iandstewart]

In 30304:

Twenty Fifteen: simplify the code used to generate screen reader text for the is_home title.

Props davidakennedy, fixes #30305