Remove BuildRoot definition

None of currently supported distributions need that.
It was needed last for EL5 which is EOL now

Signed-off-by: Igor Gnatenko <ignatenkobrain@fedoraproject.org>

libspatialite.spec

@@ -48,7 +48,6 @@ License:   MPLv1.1 or GPLv2+ or LGPLv2+
 URL:       https://www.gaia-gis.it/fossil/libspatialite
 Source0:   http://www.gaia-gis.it/gaia-sins/%{name}-sources/%{name}-%{version}.tar.gz
 
-BuildRoot: %(mktemp -ud %{_tmppath}/%{name}-%{version}-%{release}-XXXXXX)
 
 # EPEL 5 reminiscences are for ELGIS