Removing ZIP extension from NDS as it's not supported by our default emulator

Author: XargonWan

resources/systems/linux/es_systems.xml

@@ -1319,7 +1319,7 @@
         <name>nds</name>
         <fullname>Nintendo DS</fullname>
         <path>%ROMPATH%/nds</path>
-        <extension>.app .APP .bin .BIN .nds .NDS .7z .7Z .zip .ZIP</extension>
+        <extension>.app .APP .bin .BIN .nds .NDS .7z .7Z</extension>
         <command label="DeSmuME">%EMULATOR_RETROARCH% -L %CORE_RETROARCH%/desmume_libretro.so %ROM%</command>
         <command label="DeSmuME 2015">%EMULATOR_RETROARCH% -L %CORE_RETROARCH%/desmume2015_libretro.so %ROM%</command>
         <command label="melonDS DS">%EMULATOR_RETROARCH% -L %CORE_RETROARCH%/melondsds_libretro.so %ROM%</command>