Delete tlg0057.tlg001.opp-eng1.mods1.xml

This is a invalid version-we don't have this work cataloged by Galen, a mistyped identifier caused this to be generated incorrectly.            
<mods:identifier type="tlg">0057.001</mods:identifier>
This should have been tlg 0557.001, as we do not have this work by Galen. I have redirected the two versions as invalid.