PSP: removed iso files as they're not supported by PPSSPP

Author: XargonWan

resources/systems/linux/es_systems.xml

@@ -1641,7 +1641,7 @@
         <name>psp</name>
         <fullname>Sony PlayStation Portable</fullname>
         <path>%ROMPATH%/psp</path>
-        <extension>.chd .CHD .cso .CSO .elf .ELF .iso .ISO .pbp .PBP .prx .PRX .7z .7Z .zip .ZIP</extension>
+        <extension>.chd .CHD .cso .CSO .elf .ELF .iso .ISO .pbp .PBP .prx .PRX</extension>
         <command label="PPSSPP (Standalone)">%EMULATOR_PPSSPP% %ROM%</command>
         <command label="PPSSPP">%EMULATOR_RETROARCH% -L %CORE_RETROARCH%/ppsspp_libretro.so %ROM%</command>
         <platform>psp</platform>