Delete root boot_pkg (UltraHand)

Mainly to remove the Launch notice after successful install

source/main.c

@@ -178,6 +178,7 @@ int main(int argc, char *argv[]) {
     }
 
     remove("sdmc:/switch/.PatchExtractor.nro.star");
+    remove("sdmc:/switch/.packages/boot_package.ini");
 
     printf("\n  ========================================\n");
     if (skipped == 0 && cleanup_ok) {