cgraph: Do not warn about caller count mismatches of removed functions

To verify other changes in the patch series, I have been searching for
"Invalid sum of caller counts" string in symtab dump but found that
there are false warnings about functions which have their body removed
because they are now unreachable.  Those are of course invalid and so
this patches avoids checking such cgraph_nodes.

gcc/ChangeLog:

2021-08-20  Martin Jambor  <mjambor@suse.cz>

	* cgraph.c (cgraph_node::dump): Do not check caller count sums if
	the body has been removed.  Remove trailing whitespace.