Select.test.in: removed unused variable FORMAT.

test/Select.test.in

@@ -4,7 +4,6 @@ echo 1..8 # Number of tests to be executed.
 test -n "$CDO"      || CDO="@abs_top_builddir@/src/cdo $CDO_DEBUG"
 test -n "$DATAPATH" || DATAPATH="@abs_top_srcdir@/test/data/"
 #
-FORMAT="-f srv -b 32"
 RSTAT=0;
 #
 IFILE=$DATAPATH/pl_data.grb