Eliminating Assembler Already Defined Messages for Java Library

[Richard Kenner]

  		  if (debug_ignore_block (NOTE_BLOCK (insn)))
  		    {
- 		      BLOCK_DEAD (NOTE_BLOCK (insn)) = 1;
  		      remove_insn (tmp);
  		      remove_insn (insn);
  		    }

Note that this is clearly incorrect since we have deleted the
notes delimiting a BLOCK but have done nothing to the block node.