tdf#120515 ODT filter: relax layout requirement before export

This reverts commit 343af46fc301a984929e071d477b8fb9f211e289 (ODT
filter: make sure we have a layout before export, 2017-11-29) as it
causes a performance problem with large documents (see bugreport).

I added it initially for the EPUB export, but there this is no longer
needed as commit 3ed8466b55ace15a28761e06b6bb76ebd8758106 (EPUB export,
fixed layout: switch to a metafile-based approach, 2017-12-01) switched
to the better metafile-based approach.

(cherry picked from commit e83c1f0ef999bdedaf9a5d5903aa5423c40f6d95)

Change-Id: Ie404e23db77b8ded1d29f42b6279a3cd06a574b5
Reviewed-on: https://gerrit.libreoffice.org/62963
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>
diff --git a/sw/source/filter/xml/xmlexp.cxx b/sw/source/filter/xml/xmlexp.cxx
index eb13bc3..7537d13 100644
--- a/sw/source/filter/xml/xmlexp.cxx
+++ b/sw/source/filter/xml/xmlexp.cxx
@@ -128,11 +128,6 @@ ErrCode SwXMLExport::exportDoc( enum XMLTokenEnum eClass )
    if (!pDoc)
        return ERR_SWG_WRITE_ERROR;

    // Make sure the layout is available to have more stability in the output
    // markup.
    if (SwViewShell* pViewShell = pDoc->getIDocumentLayoutAccess().GetCurrentViewShell())
        pViewShell->CalcLayout();

    if( getExportFlags() & (SvXMLExportFlags::FONTDECLS|SvXMLExportFlags::STYLES|
                            SvXMLExportFlags::MASTERSTYLES|SvXMLExportFlags::CONTENT))
    {