Fix #4933: streamline code slightly (#4935)

Author: cowtowncoder

src/main/java/com/fasterxml/jackson/databind/deser/std/StdKeyDeserializer.java

@@ -194,11 +194,6 @@ protected Object _parse(String key, DeserializationContext ctxt) throws Exceptio
         case TYPE_DOUBLE:
             return _parseDouble(key);
         case TYPE_LOCALE:
-            try {
-                return _deser._deserialize(key, ctxt);
-            } catch (IllegalArgumentException e) {
-                return _weirdKey(ctxt, key, e);
-            }
         case TYPE_CURRENCY:
             try {
                 return _deser._deserialize(key, ctxt);