projectsmirrors: drop some sites

This commit drop ftp.nara.wide.ad.jp and
www.ring.gr.jp from projectsmirrors.

These mirrors only supports plain HTTP.
Drop mirrors that does no meet modern
security standards.

Signed-off-by: Yanase Yuki <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/21268
Signed-off-by: Hauke Mehrtens <[email protected]>

scripts/projectsmirrors.json

@@ -47,15 +47,12 @@
 	"@KERNEL": [
 		"https://cdn.kernel.org/pub",
 		"https://mirrors.mit.edu/kernel",
-		"http://ftp.nara.wide.ad.jp/pub/kernel.org",
-		"http://www.ring.gr.jp/archives/linux/kernel.org",
 		"https://www.mirrorservice.org/sites/ftp.kernel.org/pub",
 		"https://mirrors.ustc.edu.cn/kernel.org"
 	],
 	"@GNOME": [
 		"https://download.gnome.org/sources",
-		"https://mirror.csclub.uwaterloo.ca/gnome/sources",
-		"http://ftp.nara.wide.ad.jp/pub/X11/GNOME/sources"
+		"https://mirror.csclub.uwaterloo.ca/gnome/sources"
 	],
 	"@OPENWRT": [
 		"https://sources.cdn.openwrt.org",