This terraform-plugin-sdk (v1) analyzer has been removed in tfproviderlint v0.30.0.
The V006 analyzer reports usage of the deprecated ValidateListUniqueStrings validation function that should be replaced with ListOfUniqueStrings.
ValidateFunc: validation.ValidateListUniqueStrings,
ValidateFunc: validation.ListOfUniqueStrings,
Singular reports can be ignored by adding the a //lintignore:V006
Go code comment at the end of the offending line or on the line immediately proceding, e.g.
//lintignore:V006
ValidateFunc: validation.ValidateListUniqueStrings,