Boot loader problem - Windows partition

[Irshad.T]

I was trying to delete windows 10 from macbook pro mid 15 macOS Mojave 10.14.1. I couldnt delete the partition as it was Windows NFTS and it was greyd out. So i choose something from the list gave non space to bootcamp windows in diskutility app and it automatically deleted bootcamp partition and gave macOS all the space. But the BootLoader is still showing windows when mac is powered on using the option (alt) key. The problem is I don't have any idea what I have done and what I should do to correct it. I don't want windows back. Following is the result when from terminal when I enter

diskutil list

/dev/disk0 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                         *500.3 GB  disk0
   1:                 EFI EFI                             209.7 MB  disk0s1
   2:                 Apple_APFS Container disk1          500.1 GB  disk0s2

/dev/disk1 (synthesized):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      APFS Container Scheme -                      +500.1 GB   disk1
                                Physical Store disk0s2
   1:                APFS Volume Macintosh HD            238.5 GB   disk1s1
   2:                APFS Volume Preboot                  44.6 MB   disk1s2
   3:                APFS Volume Recovery                512.8 MB   disk1s3
   4:                APFS Volume VM                        1.1 GB   disk1s4

When i enter

sudo gpt -r show /dev/disk0

and respective identifiers it says "gpt show: unable to open device '/dev/disk0': Operation not permitted" with its respective number on dev/diskXX. But only on disk0s1 it shows:

start     size          index     contents
0         1                       MBR
1         40599

I'm a newbie to this part of computers. Please describe as detailed as possible.

 

[IowaLynn]

And you didn't simply use Boot Camp Assistant utility because...?

Did you use a VM along with Windiws?

 

[Irshad.T]

And you didn't simply use Boot Camp Assistant utility because...?

Did you use a VM along with Windiws?

It wouldnt work with Bootcamp assistant. I dont remember exactly but it gave me an error message in pop-upwhen started boot camp and tried to press the "next" button. Therefore I used diskutility app and pressed the minus button on the boot camp partion to remove it.