bridge linux x86-64 : remove useless includes

Change-Id: Ibd3b9a76b700a5efbf7855454714646daf612d13
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/147675
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

bridges/source/cpp_uno/gcc3_linux_x86-64/callvirtualmethod.cxx

@@ -19,8 +19,6 @@
 
 #include <sal/config.h>
 
-#include <cstring>
-
 #include <cppu/macros.hxx>
 #include <sal/types.h>
 #include <typelib/typeclass.h>

bridges/source/cpp_uno/gcc3_linux_x86-64/cpp2uno.cxx

@@ -18,8 +18,6 @@
  */
 
 
-#include <stdio.h>
-#include <stdlib.h>
 #include <typeinfo>
 
 #include <rtl/alloc.h>

bridges/source/cpp_uno/gcc3_linux_x86-64/except.cxx

@@ -17,10 +17,6 @@
  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  */
 
-
-#include <stdio.h>
-#include <string.h>
-
 #include <rtl/ustrbuf.hxx>
 #include <sal/log.hxx>