Question

How to find/remove input element in form by value ?

Answer 1

You can use filter to cover all the bases:

var matches = $('input').filter(function() { return this.value == 'what you want' });
matches.remove(); // If you want to remove them of course.

An attribute selector only sees things that have the value attribute set in the DOM so that won’t see an <input> that has been updated with a val(x) call, using a filter will see things that have been updated with .val(x).

For example: http://jsfiddle.net/ambiguous/RVWu6/