Just change this:
<?php if( is_page() ) { ?>
to:
<?php if( is_page() && !is_page(42) ) { ?>
You can also try to use is_home()
and is_front_page()
. These 2 will be even better, since they are more universal (not based on pageId). If you change the page that is your home/front page, this will still work.