nano: Remove dependency on file

Dependency on file was added on version 2.7.4, but even then, there was
no reference to this dependency in nano documentation.
Today, still no reference to file as a dependency.

Cc: Yoann Congal <yoann.congal@smile.fr>
Signed-off-by: Alexis Cellier <alexis.cellier@smile.fr>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-support/nano/nano_8.3.bb

@@ -7,7 +7,7 @@ SECTION = "console/utils"
 LICENSE = "GPL-3.0-only"
 LIC_FILES_CHKSUM = "file://COPYING;md5=f27defe1e96c2e1ecd4e0c9be8967949"
 
-DEPENDS = "ncurses file"
+DEPENDS = "ncurses"
 RDEPENDS:${PN} = "ncurses-terminfo-base"
 
 PV_MAJOR = "${@d.getVar('PV').split('.')[0]}"