[gnome-disk-utility] Remove unused erase disks dialog

[Ondrej Holy <oholy src gnome org>]

commit 7baa0e61553a423045b7e9395bd06f6102322cbd
Author: Kai Lüke <kailueke riseup net>
Date:   Thu Apr 20 17:16:10 2017 +0200

    Remove unused erase disks dialog
    
    The dialog to erase multiple disks is unused since
    the selection of more than one disk was removed in
    dd6c6bd4df9cf71f6e4875125760c1700067fa2d
    
    References and source files have been deleted.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=780865

 po/POTFILES.in                          |    1 -
 src/disks/Makefile.am                   |    1 -
 src/disks/gduerasemultipledisksdialog.c |  416 -------------------------------
 src/disks/gduerasemultipledisksdialog.h |   23 --
 src/disks/gduwindow.c                   |    1 -
 5 files changed, 0 insertions(+), 442 deletions(-)
---
diff --git a/po/POTFILES.in b/po/POTFILES.in
index d1633ea..63be297 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -16,7 +16,6 @@ src/disks/gducreatepartitiondialog.c
 src/disks/gducrypttabdialog.c
 src/disks/gdudevicetreemodel.c
 src/disks/gdudisksettingsdialog.c
-src/disks/gduerasemultipledisksdialog.c
 src/disks/gduestimator.c
 src/disks/gdufilesystemdialog.c
 src/disks/gduformatdiskdialog.c
diff --git a/src/disks/Makefile.am b/src/disks/Makefile.am
index 0689618..4e22e3d 100644
--- a/src/disks/Makefile.am
+++ b/src/disks/Makefile.am
@@ -58,7 +58,6 @@ gnome_disks_SOURCES =                                                         \
        gduestimator.h                  gduestimator.c                  \
        gduchangepassphrasedialog.h     gduchangepassphrasedialog.c     \
        gdudisksettingsdialog.h         gdudisksettingsdialog.c         \
-       gduerasemultipledisksdialog.h   gduerasemultipledisksdialog.c   \
        gdudvdsupport.h                 gdudvdsupport.c                 \
        gdulocaljob.h                   gdulocaljob.c                   \
        gduxzdecompressor.h             gduxzdecompressor.c             \
diff --git a/src/disks/gduwindow.c b/src/disks/gduwindow.c
index 74f4cdf..a0625a7 100644
--- a/src/disks/gduwindow.c
+++ b/src/disks/gduwindow.c
@@ -37,7 +37,6 @@
 #include "gdurestorediskimagedialog.h"
 #include "gduchangepassphrasedialog.h"
 #include "gdudisksettingsdialog.h"
-#include "gduerasemultipledisksdialog.h"
 #include "gdulocaljob.h"
 
 struct _GduWindow