Remove outdated comments.

llvm-svn: 202186
diff --git a/llvm/lib/CodeGen/RegAllocGreedy.cpp b/llvm/lib/CodeGen/RegAllocGreedy.cpp
index 21e23df..19a9e31 100644
--- a/llvm/lib/CodeGen/RegAllocGreedy.cpp
+++ b/llvm/lib/CodeGen/RegAllocGreedy.cpp
@@ -601,7 +601,7 @@
 }
 
 /// canEvictInterference - Return true if all interferences between VirtReg and
-/// PhysReg can be evicted.  When OnlyCheap is set, don't do anything
+/// PhysReg can be evicted.
 ///
 /// @param VirtReg Live range that is about to be assigned.
 /// @param PhysReg Desired register for assignment.