Remove test of 'inf' since it introduces a platform dependency (some

Unixen spell it 'Inf').  Not worth adding multiple expected files and
a resultmap just for this.

contrib/cube/expected/cube.out

@@ -127,18 +127,6 @@ SELECT '-1.0e-7'::cube AS cube;
  (-1e-07)
 (1 row)
 
-SELECT '1e700'::cube AS cube;
- cube  
--------
- (inf)
-(1 row)
-
-SELECT '-1e700'::cube AS cube;
-  cube  
---------
- (-inf)
-(1 row)
-
 SELECT '1e-700'::cube AS cube;
  cube 
 ------

contrib/cube/sql/cube.sql

@@ -35,8 +35,6 @@ SELECT '1e-7'::cube AS cube;
 SELECT '-1e-7'::cube AS cube;
 SELECT '1.0e-7'::cube AS cube;
 SELECT '-1.0e-7'::cube AS cube;
-SELECT '1e700'::cube AS cube;
-SELECT '-1e700'::cube AS cube;
 SELECT '1e-700'::cube AS cube;
 SELECT '-1e-700'::cube AS cube;