don't include unused tools/string.hxx

Change-Id: Ia7ac4594c1b9cb853b5f8f5bf76864703376710e
Reviewed-on: https://gerrit.libreoffice.org/6236Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

sw/source/core/text/porlay.hxx

@@ -19,7 +19,6 @@
 #ifndef _PORLAY_HXX
 #define _PORLAY_HXX
 
-#include <tools/string.hxx>
 #include <tools/fract.hxx>
 #include <scriptinfo.hxx>
 

sw/source/core/tox/toxhlp.cxx

@@ -20,7 +20,6 @@
 #include <com/sun/star/lang/XMultiServiceFactory.hpp>
 #include <comphelper/processfactory.hxx>
 #include <com/sun/star/i18n/IndexEntrySupplier.hpp>
-#include <tools/string.hxx>
 #include <toxwrap.hxx>
 #include <sal/log.hxx>
 

sw/source/filter/ww8/styles.cxx

@@ -22,8 +22,7 @@
 
 #include <functional>               //std::unary_function
 #include <algorithm>                //std::find_if
-#include <tools/string.hxx>         //do we have to...
-
+#include "rtl/ustring.hxx"
 #include "staticassert.hxx"      //StaticAssert
 
 namespace

sw/source/filter/ww8/ww8par.hxx

@@ -20,7 +20,6 @@
 #ifndef _WW8PAR_HXX
 #define _WW8PAR_HXX
 
-#include <tools/string.hxx>
 #include "rtl/ustring.hxx"
 #include <filter/msfilter/msdffimp.hxx>
 #include <filter/msfilter/util.hxx>