Course, UpsideDown: Remove copyright symbol (#7981)

The copyright symbol in these themes was just positioned infront of
'Designed with...' which didn't make sense. Removing completely - users
would've needed to customise the pattern for the copyright to have made
sense anyway.

course/patterns/footer.php

@@ -135,7 +135,7 @@
         <?php
           $wordpress_link = '<a href="' . esc_url( __( 'https://wordpress.org', 'course' ) ) . '" rel="nofollow">WordPress</a>';
             echo sprintf(
-                esc_html__( '© Designed with %1$s', 'course' ),
+                esc_html__( 'Designed with %1$s', 'course' ),
                 $wordpress_link
             );
         ?>

upsidedown/patterns/footer.php

@@ -56,7 +56,7 @@
                     /* Translators: WordPress link. */
                     $wordpress_link = '<a href="' . esc_url( __( 'https://wordpress.org', 'upsidedown' ) ) . '" rel="nofollow">WordPress</a>';
                     echo sprintf(
-                        esc_html__( '© Designed with %1$s', 'upsidedown' ),
+                        esc_html__( 'Designed with %1$s', 'upsidedown' ),
                         $wordpress_link
                     );
                 ?>
@@ -73,4 +73,4 @@
     </div>
     <!-- /wp:group -->
 </div>
-<!-- /wp:group -->
+<!-- /wp:group -->