pagemap: remove debug print in skip_pagemap_page

It seems that logging amount of skipped pages was useful for early
debugging of pre-dumps, but now it just creates a lot of noise for lazy
pages and pre-dump tests.
Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

criu/pagemap.c

@@ -165,7 +165,6 @@ static void skip_pagemap_pages(struct page_read *pr, unsigned long len)
 	if (!len)
 		return;
 
-	pr_debug("\tpr%u Skip %lu bytes from page-dump\n", pr->id, len);
 	if (!pr->pe->in_parent)
 		pr->pi_off += len;
 	pr->cvaddr += len;