libxslt: remove configure patch

It dates back to the initial libxslt submission, has no documentation and
doesn't seem to be needed.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/libxslt/libxslt-configure.patch

@@ -1,18 +0,0 @@
---- a/configure	2007-06-12 12:43:03.000000000 -0400
-+++ b/configure	2008-02-18 08:52:36.000000000 -0500
-@@ -22090,15 +22090,11 @@ esac
- 
- 
- 
--XSLT_LIBDIR='-L${libdir}'
--XSLT_INCLUDEDIR='-I${includedir}'
- XSLT_LIBS="-lxslt $LIBXML_LIBS $M_LIBS"
- 
- 
- 
- 
--EXSLT_LIBDIR='-L${libdir}'
--EXSLT_INCLUDEDIR='-I${includedir}'
- EXSLT_LIBS="-lexslt $XSLT_LIBS $LIBGCRYPT_LIBS"
- 
-