* tree-flow.h (mark_symbols_for_renaming): Remove.
* tree-dfa.c (mark_symbols_for_renaming): Likewise.
* tree-inline.c (copy_edges_for_bb): Do not mark symbols for
renaming.
(copy_debug_stmt): Likewise.
(expand_call_inline): Likewise.
(declare_return_variable): Mark the return variable for renaming
if necessary.