[glib/wip/mjog/gitignore] build: Remove */.gitignore files

[Michael Gratton <mjog src gnome org>]

commit 6b61395c2dd6c032630fc74b6ceff90dc903399a
Author: Michael Gratton <mike vee net>
Date:   Mon Apr 22 22:17:43 2019 +1000

    build: Remove */.gitignore files
    
    Since out-of-source-tree builds are now used after switching to meson,
    we don't need .gitignore files in the source directories to ignore
    build artifacts.
    
    This fixes build errors when doing a meson build after an autotools
    build, because generated files such as gio/xdp-dbus.c won't show up in
    a `git status`, or be removed by a `git clean -f`, and so it won't be
    obvious that such files need to be removed for the meson build to
    succeed.

 gio/.gitignore     | 20 --------------
 glib/.gitignore    | 10 -------
 gmodule/.gitignore |  1 -
 gobject/.gitignore |  8 ------
 po/.gitignore      |  3 ---
 tests/.gitignore   | 76 ------------------------------------------------------
 6 files changed, 118 deletions(-)