I need help hiding my web-to-lead URL drob down

I'm new to coding and I'm trying to align these boxes and delete the web-to-lead URL dropdown before the submit button. Any help is greatly appreciated. http://www.shorelineconsultinginc.com/Contact_Us.html

This code is from your website and is edited and should work

<!-- ---------------------------------------------------------------------- -->
<!-- NOTE: These fields are optional debugging elements. Please uncomment -->
<!-- these lines if you wish to test in debug mode. -->
<!-- <input type="hidden" name="debug" value=1> -->
<!-- <input type="hidden" name="debugEmail" value="shell@shellblack.com"> -->
<!-- ---------------------------------------------------------------------- -->

<label for="first_name" >First Name </label><input id="first_name" maxlength="40" name="first_name" size="23" type="text" /><br>
<br>
<label for="last_name">Last Name </label><input id="last_name" maxlength="80" name="last_name" size="23" type="text" /><br><br>

<label for="email" >Email </label><input id="email" maxlength="80" name="email" size="29" type="text" /><br><br>

<label for="phone" >Phone </label><input id="phone" maxlength="40" name="phone" size="28" type="text" /><br><br>

<label for="mobile">Mobile </label><input id="mobile" maxlength="40" name="mobile" size="28" type="text" /><br><br>

<label for="street">Address </label><textarea name="street"></textarea><br><br>

<label for="city">City </label><input id="city" maxlength="40" name="city" size="31" type="text" /><br><br>

<label for="state" >State/Province </label><input id="state" maxlength="20" name="state" size="20" type="text" /><br><br>

<label for="zip">Zip </label><input id="zip" maxlength="20" name="zip" size="32" type="text" /><br><br>

<label for="description">Description </label><textarea name="description"></textarea><br><br>

<br>

<input type="submit" name="submit">