[grubcfg] remove loglevel settings

- with systemd 239.3-1 we have quiet really quiet

src/modules/grubcfg/main.py

@@ -103,10 +103,6 @@ def modify_grub_default(partitions, root_mount_point, distributor):
 
     kernel_params = ["quiet"]
 
-    if os.path.exists(os.path.join(root_mount_point, "usr/bin/grub-set-bootflag")):
-        grub_params = ["loglevel=3", "rd.systemd.show_status=auto", "rd.udev.log-priority=3"]
-        kernel_params.extend(grub_params)
-
     if cryptdevice_params:
         kernel_params.extend(cryptdevice_params)