llvm-slicer: don't adjust phi nodes in self
llvm-slicer: don't adjust phi nodes in self

when we're removing block, we don't need to adjust
phi nodes in it, since we're gonna erase it entirely

Signed-off-by: Marek Chalupa <a05df156a69ad59faa9af9b666ef78009594c145@gmail.com>

mchalupa/dg,mchalupa/dg,mchalupa/dg,mchalupa/dg