code: public static Schema minusFields(String newName, Schema schema, String... minusFields) {
  		List<Field> newSchema = new ArrayList<Field>();
  		l1: for(Field f: schema.getFields()) {
  			for(String minsField: minusFields) {
  				if(f.getName().equals(minsField)) {
  					continue l1;
  				}
  			}
  			newSchema.add(f);
  		}
  		return new Schema(newName, newSchema);		
  	}
docs: Creates a new schema which has exactly the same fields as the input Schema minus the field names
  that are specified as "minusFields". This is equivalent to calling {@link #subSetOf(Schema, String...)}
  with the list of Fields that must remain, but instead here we specify the fields that should NOT remain.
  <p>
  The name of the schema is also specified as a parameter.