gconvert: fix redundant-decls of _g_charset_get_aliases()

_g_charset_get_aliases() is already declared in gcharsetprivate.h
which was added by commit 4c2a6595889eff44fa, and gconvert.c includes
this gcharsetprivate header, so no need to declare it again.

Signed-off-by: Djalal Harouni <tixxdz@opendz.org>

https://bugzilla.gnome.org/show_bug.cgi?id=710345
gutils: fix redundant-decls of g_init_user_config_dir()

g_init_user_config_dir() is already declared as static in this gutils.c
file, so just remove the redundant declaration.

Signed-off-by: Djalal Harouni <tixxdz@opendz.org>

https://bugzilla.gnome.org/show_bug.cgi?id=710345
gio/gbufferedinputstream: fix redundant-decls of g_buffered_input_stream_finalize()

g_buffered_input_stream_finalize() is already declared as static in this
gbufferedinputstream.c file, so just remove the redundant declaration.

Signed-off-by: Djalal Harouni <tixxdz@opendz.org>

https://bugzilla.gnome.org/show_bug.cgi?id=710345