[RemoveDIs][NFC] Delete a now-redundant comment

Submitted without review for being a trivial comment-only change, deletes
a line that requests the DbgLabelRecord class be renamed to DbgLabelRecord
in the future.

Author: SLTozer

llvm/include/llvm/IR/DebugProgramInstruction.h

@@ -220,8 +220,6 @@ inline raw_ostream &operator<<(raw_ostream &OS, const DbgRecord &R) {
 
 /// Records a position in IR for a source label (DILabel). Corresponds to the
 /// llvm.dbg.label intrinsic.
-/// FIXME: Rename DbgLabelRecord when DbgVariableRecord is renamed to
-/// DbgVariableRecord.
 class DbgLabelRecord : public DbgRecord {
   DbgRecordParamRef<DILabel> Label;