cleanup: remove support for PASCAL in get_pressure_units()

The user preferences can never end up with PASCAL pressure
units. The only place that uses these units is the XML parser.
Therefore, remove the PASCAL case in get_pressure_units().
This will remove an unused translation string.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>

core/units.c

@@ -9,10 +9,6 @@ int get_pressure_units(int mb, const char **units)
 	const struct units *units_p = get_units();
 
 	switch (units_p->pressure) {
-	case PASCALS:
-		pressure = mb * 100;
-		unit = translate("gettextFromC", "pascal");
-		break;
 	case BAR:
 	default:
 		pressure = (mb + 500) / 1000;