Improperly removed Bootcamp

See terminal info below;

Khamars-MacBook-Air:~ Khamar$ diskutil list

/dev/disk0 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *251.0 GB
disk0

1: EFI EFI 209.7 MB
disk0s1

2: Apple_APFS Container disk1 189.0 GB
disk0s2

/dev/disk1 (synthesized):

#: TYPE NAME SIZE IDENTIFIER

0: APFS Container Scheme - +189.0 GB
disk1

Physical Store disk0s2

1: APFS Volume Macintosh HD 181.8 GB
disk1s1

2: APFS Volume Preboot 22.1 MB disk1s2

3: APFS Volume Recovery 517.8 MB
disk1s3

4: APFS Volume VM 1.1 GB disk1s4

So I have a missing 61.8 GBs.

This command (sudo diskutil cs revert /dev/disk1) returns the following result;

/dev/disk1 is not a CoreStorage Logical Volume