missing feature Project Workspace Document Libraries when performing test-spcontentdatabse

Hi ,

i am trying to do content Datatabse upgrade in Sp2013 . When i run

Test-SPContentDatabase -Name WSS_Content_prodrestore -WebApplication https://mywebapp.contoso.com I get

Category        : MissingFeature
Error           : True
UpgradeBlocking : False
Message         : Database [WSS_Content_prodrestore] has reference(s) to a missing feature: Id = [525dc00c-0745-47c0-8073-221c2ec22f0f], Name = [Project Workspace Document Libraries], Description = [Provides support for Microsoft Office Project
Server document libraries.], Install Location = [pwsdoclibs].
I looked for teh missing feature in teh database using SQl query i. e

select * from featuresjoin webson(features.webid= webs.id)where featureid='525dc00c-0745-47c0-8073-221c2ec22f0f'

but does not give any results . I then used "FeatureAdmin for Sharepoint 2010" from Codeplex, loaded all the features found and deleted the feature pwsdoclibs. Perform backup , restore . Then tried test-spcontent databse again but getting same results.

Any idea how to remove Projetc server features ? We never used project server feature in sp2010 but looks like it may have got over to sp2010 from moss2007 upgrade .

Thanks

mp