AssetService doesn't parse thumbnail mediaQuery config if format is not AUTO

[benwalch]

Q	A
Bug report?	yes
Feature request?	no
BC Break report?	no
RFC?	no

Because of this condition (what's the advantage of this ?) the asset service does not parse and process any configured media queries if something other than "auto" is set as the format:

    if (!$isAutoFormat) {
        continue;
    }

This lines should be removed