Remove split view stock and icon as it's not used anymore
[modest] / src / gtk /
drwxr-xr-x   ..
-rw-r--r-- 2202 Makefile.am
-rw-r--r-- 32053 modest-gtk-window-mgr.c
-rw-r--r-- 3558 modest-gtk-window-mgr.h
-rw-r--r-- 5365 modest-icon-names.h
-rw-r--r-- 68317 modest-platform.c
-rw-r--r-- 6833 modest-shell-banner.c
-rw-r--r-- 3223 modest-shell-banner.h
-rw-r--r-- 11133 modest-shell-window.c
-rw-r--r-- 3104 modest-shell-window.h
-rw-r--r-- 17984 modest-shell.c
-rw-r--r-- 3304 modest-shell.h