Font Library: remove has_font_mime_type function

[matiasbenedetto]

What?

We could simplify the code by entirely removing the WP_Font_Family_Utils::has_font_mime_type() function and its tests.
This was a workaround when we didn't have the wp_handle_upload() mime type checking in place.

gutenberg/lib/experimental/fonts/font-library/class-wp-font-family-utils.php

Lines 87 to 92 in 937d51e

	public static function has_font_mime_type( $filepath ) {
	$filetype = wp_check_filetype( $filepath, WP_Font_Library::ALLOWED_FONT_MIME_TYPES );
	return in_array( $filetype['type'], WP_Font_Library::ALLOWED_FONT_MIME_TYPES, true );
	}
	}

Why?

We can remove it now because it's no longer necessary. The mime type check of the downloaded/uploaded files is done by the core function wp_handle_upload, and a custom check is no longer required.

[matiasbenedetto]

Closing as fixed by: #57364