[gold][patch] Remove unused argument/member

[Rafael Espindola]

The attached patch removes an an unused member and the corresponding arguments.

2010-03-12   Rafael Espindola  <espindola@google.com>

	* readsyms.cc (Read_symbols::do_read_symbols): Update calls to
	Add_symbols' constructor.
	* readsyms.h (Add_symbols): Remove the input_group member.

Cheers,
-- 
Rafael Ávila de Espíndola
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