Make use of plvt_inject_animation_duration in fade effect

Author: mukeshpanchal27

plugins/view-transitions/includes/theme.php

@@ -316,16 +316,7 @@ function plvt_load_view_transitions(): void {
 	 */
 	$default_animation_args       = isset( $theme_support['default-animation-args'] ) ? (array) $theme_support['default-animation-args'] : array();
 	$default_animation_stylesheet = $animation_registry->get_animation_stylesheet( $theme_support['default-animation'], $default_animation_args );
-	if ( '' !== $default_animation_stylesheet ) {
-		$default_animation_stylesheet = plvt_inject_animation_duration( $default_animation_stylesheet, absint( $theme_support['default-animation-duration'] ) );
-	} else {
-		$seconds                      = absint( $theme_support['default-animation-duration'] ) / 1000;
-		$default_animation_stylesheet = sprintf(
-			/* translators: %s is animation duration in seconds. */
-			'::view-transition-group(*) { animation-duration: %ss; }',
-			$seconds
-		);
-	}
+	$default_animation_stylesheet = plvt_inject_animation_duration( $default_animation_stylesheet, absint( $theme_support['default-animation-duration'] ) );
 	wp_add_inline_style( 'plvt-view-transitions', $default_animation_stylesheet );
 
 	/*