Fix files that weren't deleted, update ace3ds+ readme

ace3ds.com_r4isdhc.com.cn_r4isdhc.hk_2021/README.txt

@@ -1,3 +1,9 @@
+Compatible with:
+Ace3DS+
+Ace3DS X
+r4isdhc.com.cn (all cards)
+r4isdhc.hk (2021)
+
 SNES games MUST be saved in the /ROMs/SNES folder or it WILL NOT show up.
 GameYob is DLDI patched.
 

r4dsl.net/README.txt

@@ -1,3 +0,0 @@
-r4dsl.net, r4iiinew.com, r4iii.com, iii.phqy.net
-
-cheats: R4iMenu/usrcheat.dat

r4isdhc.com.cn/README.txt

@@ -1,10 +0,0 @@
-Also works with:
-Ace3DS+ and clones (XXX in 1 or no-sticker black cart)
-
-SNES games MUST be saved in the /ROMs/SNES folder or it WILL NOT show up.
-All apps in the multi loader menu are DLDI patched.
-
-If you do not need any additional emulators or media player and you want only the basic NDS stuff, use the "lite" kernel.
-
-cheats (NDS):
-__rpg/cheats/usrcheat.dat