QDecompressHelper: uncache acceptedEncoding

The only user already has its own cache of transformed copy of acceptedEncoding list since 43d15dd572

Change-Id: I485b41555f327c6ff39dd48347240a725f00e09b
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>

src/network/access/qdecompresshelper.cpp

@@ -75,15 +75,12 @@ bool QDecompressHelper::isSupportedEncoding(QByteArrayView encoding)
 
 QByteArrayList QDecompressHelper::acceptedEncoding()
 {
-    static QByteArrayList accepted = []() {
     QByteArrayList list;
     list.reserve(std::size(contentEncodingMapping));
     for (const auto &mapping : contentEncodingMapping) {
         list << mapping.name.toByteArray();
     }
     return list;
-    }();
-    return accepted;
 }
 
 QDecompressHelper::~QDecompressHelper()