code: public HttpRequest withoutParameter(String parameter) {
  		if(Strings.isValid(parameter)) {
  			for(HttpParameter p : parameters) {
  				if(parameter.equals(p.getName())) {
  					parameters.remove(p);
  				}
  			}
  		}
  		return this;
  	}
docs: Resets the value of the given parameter.
  
  @param parameter
  the name of the parameter to reset.
  @return
  the object itself, for method chaining.