Drop exp value for :number tests with bad option values (#939)

Author: eemeli

test/tests/functions/number.json

@@ -133,7 +133,6 @@
     {
       "src": ".local $foo = {$bar :number minimumFractionDigits=foo} {{bar {$foo}}}",
       "params": [{ "name": "bar", "value": 4.2 }],
-      "exp": "bar {$foo}",
       "expErrors": [{ "type": "bad-option" }]
     },
     {
@@ -164,18 +163,8 @@
     },
     {
       "src": ".input {$foo :number minimumFractionDigits=foo} {{bar {$foo}}}",
-      "params": [
-        {
-          "name": "foo",
-          "value": 4.2
-        }
-      ],
-      "exp": "bar {$foo}",
-      "expErrors": [
-        {
-          "type": "bad-option"
-        }
-      ]
+      "params": [{ "name": "foo", "value": 4.2 }],
+      "expErrors": [{ "type": "bad-option" }]
     },
     {
       "src": ".input {$foo :number} {{bar {$foo}}}",