Revert "tdf#118133 DOCX import: disable lazy-loading of tiff images"

This reverts commit fa356008b0

Similar to 1238ca8d10 <Revert
"tdf#126310 Disable lazy loading of WMF images> it seems this
workaround is no longer needed and lazy-loading works with
tiff images.
The unittest has not been reverted

Change-Id: Ie8debfc2978a4b57aa035679116472c98db89e33
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/112162
Tested-by: Jenkins
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>

oox/source/helper/graphichelper.cxx

@@ -251,8 +251,7 @@ Reference< XGraphic > GraphicHelper::importGraphic( const Reference< XInputStrea
         aArgs[ 0 ].Name = "InputStream";
         aArgs[ 0 ].Value <<= rxInStrm;
         aArgs[ 1 ].Name = "LazyRead";
-        bool bLazyRead = !pExtHeader;
-        aArgs[ 1 ].Value <<= bLazyRead;
+        aArgs[ 1 ].Value <<= true;
 
         if ( pExtHeader && pExtHeader->mapMode > 0 )
         {
@@ -301,11 +300,6 @@ Reference< XGraphic > GraphicHelper::importEmbeddedGraphic( const OUString& rStr
         xGraphic = mxGraphicMapper->findGraphic(rStreamName);
         if (!xGraphic.is())
         {
-            // Lazy-loading doesn't work with TIFF at the moment.
-            WmfExternal aHeader;
-            if (rStreamName.endsWith(".tiff") && !pExtHeader)
-                pExtHeader = &aHeader;
-
             auto xStream = mxStorage->openInputStream(rStreamName);
             xGraphic = importGraphic(xStream, pExtHeader);
             if (xGraphic.is())