Umount is already done by default if no args are given

src/configfsisomanager.cpp

@@ -109,12 +109,6 @@ void mount_iso(char *iso_path, char *cdrom, char *ro)
   set_udc(udc, gadgetRoot);
 }
 
-void umount_iso()
-{
-  char *empty = (char *)"";
-  mount_iso(empty, empty, empty);
-}
-
 void set_udc(char *udc, char *gadget)
 {
   char *udcFile = strjin(gadget, (char *)"/UDC");

src/main.cpp

@@ -5,7 +5,7 @@
 
 int main(int argc, char *argv[])
 {
-  char *iso_target = argv[1];
+  char *iso_target = (char *)"";
   char *cdrom      = (char *)"0";
   char *ro         = (char *)"1";
 
@@ -55,14 +55,7 @@ int main(int argc, char *argv[])
     return 1;
   }
 
-  if (argc > 1)
-  {
-    mount_iso(iso_target, cdrom, ro);
-  }
-  else
-  {
-    umount_iso();
-  }
+  mount_iso(iso_target, cdrom, ro);
 
   return 0;
 }