Use the automatic mapping instead of a hardcoded one for Xbox controllers on Linux

This is much more robust and able to dynamically create a mapping for Xbox One S, Xbox Series X, and Xbox Elite 2 controllers.

src/joystick/SDL_gamepad.c

@@ -1350,8 +1350,6 @@ static GamepadMapping_t *SDL_PrivateGetGamepadMappingForNameAndGUID(const char *
             mapping = SDL_PrivateAddMappingForGUID(guid,
                                                    "none,X360 Wireless Controller,a:b0,b:b1,back:b6,dpdown:b14,dpleft:b11,dpright:b12,dpup:b13,guide:b8,leftshoulder:b4,leftstick:b9,lefttrigger:a2,leftx:a0,lefty:a1,rightshoulder:b5,rightstick:b10,righttrigger:a5,rightx:a3,righty:a4,start:b7,x:b2,y:b3,",
                                                    &existing, SDL_GAMEPAD_MAPPING_PRIORITY_DEFAULT);
-        } else if (SDL_strstr(name, "Xbox") || SDL_strstr(name, "X-Box") || SDL_strstr(name, "XBOX")) {
-            mapping = s_pXInputMapping;
         }
     }
 #endif /* __LINUX__ */

src/joystick/SDL_gamepad_db.h

@@ -525,7 +525,6 @@ static const char *s_GamepadMappings[] = {
     "03000000830500006020000000000000,iBuffalo USB 2-axis 8-button Gamepad,a:b1,b:b0,back:b6,leftshoulder:b4,leftx:a0,lefty:a1,rightshoulder:b5,start:b7,x:b3,y:b2,",
 #endif
 #if defined(SDL_JOYSTICK_LINUX) || defined(__OpenBSD__)
-    "xinput,*,a:b0,b:b1,back:b6,dpdown:h0.4,dpleft:h0.8,dpright:h0.2,dpup:h0.1,guide:b8,leftshoulder:b4,leftstick:b9,lefttrigger:a2,leftx:a0,lefty:a1,rightshoulder:b5,rightstick:b10,righttrigger:a5,rightx:a3,righty:a4,start:b7,x:b2,y:b3,",
     "03000000c82d00000090000011010000,8BitDo FC30 Pro,a:b0,b:b1,back:b10,dpdown:h0.4,dpleft:h0.8,dpright:h0.2,dpup:h0.1,leftshoulder:b6,leftstick:b13,lefttrigger:a4,leftx:a0,lefty:a1,rightshoulder:b7,rightstick:b14,righttrigger:a5,rightx:a2,righty:a3,start:b11,x:b3,y:b4,hint:SDL_GAMECONTROLLER_USE_BUTTON_LABELS:=1,",
     "03000000c82d00000090000011010000,8BitDo FC30 Pro,a:b1,b:b0,back:b10,dpdown:h0.4,dpleft:h0.8,dpright:h0.2,dpup:h0.1,leftshoulder:b6,leftstick:b13,lefttrigger:a4,leftx:a0,lefty:a1,rightshoulder:b7,rightstick:b14,righttrigger:a5,rightx:a2,righty:a3,start:b11,x:b4,y:b3,hint:!SDL_GAMECONTROLLER_USE_BUTTON_LABELS:=1,",
     "05000000c82d00001038000000010000,8BitDo FC30 Pro,a:b0,b:b1,back:b10,dpdown:h0.4,dpleft:h0.8,dpright:h0.2,dpup:h0.1,leftshoulder:b6,leftstick:b13,lefttrigger:a5,leftx:a0,lefty:a1,rightshoulder:b7,rightstick:b14,righttrigger:a4,rightx:a2,righty:a3,start:b11,x:b3,y:b4,hint:SDL_GAMECONTROLLER_USE_BUTTON_LABELS:=1,",