Remove legacy button mapping.

No longer used either.

ext/native/input/input_state.cpp

@@ -28,33 +28,6 @@ const char *GetDeviceName(int deviceId) {
 	}
 }
 
-// Default pad mapping to button bits. Used for UI and stuff that doesn't use PPSSPP's key mapping system.
-int MapPadButtonFixed(int keycode) {
-	switch (keycode) {
-	case NKCODE_BACK: return PAD_BUTTON_BACK;  // Back
-	case NKCODE_MENU: return PAD_BUTTON_MENU;  // Menu
-
-	case NKCODE_Z:
-	case NKCODE_SPACE:
-	case NKCODE_BUTTON_1:
-	case NKCODE_BUTTON_A: // same as NKCODE_OUYA_BUTTON_O and NKCODE_BUTTON_CROSS_PS3
-		return PAD_BUTTON_A;
-
-	case NKCODE_ESCAPE:
-	case NKCODE_BUTTON_2:
-	case NKCODE_BUTTON_B: // same as NKCODE_OUYA_BUTTON_A and NKCODE_BUTTON_CIRCLE_PS3:
-		return PAD_BUTTON_B;
-
-	case NKCODE_DPAD_LEFT: return PAD_BUTTON_LEFT;
-	case NKCODE_DPAD_RIGHT: return PAD_BUTTON_RIGHT;
-	case NKCODE_DPAD_UP: return PAD_BUTTON_UP;
-	case NKCODE_DPAD_DOWN: return PAD_BUTTON_DOWN;
-
-	default:
-		return 0;
-	}
-}
-
 std::vector<KeyDef> dpadKeys;
 std::vector<KeyDef> confirmKeys;
 std::vector<KeyDef> cancelKeys;