gdb/dwarf: remove unnecessary dwarf2_section_info:::read calls

The sections would have been read already in
dwarf2_locate_common_dwp_sections or dwarf2_locate_dwo_sections, with
this call:

    dw_sect->read (objfile);

Change-Id: Ice0ed5d9a2070967826a59b2d6f724451ace22f4
Approved-By: Tom Tromey <tom@tromey.com>
1 file changed