Answers for "how to remove focus from input field bootstrap"

bootstrap input remove border on focus

textarea:hover, 
input:hover, 
textarea:active, 
input:active, 
textarea:focus, 
input:focus,
button:focus,
button:active,
button:hover,
label:focus,
.btn:active,
.btn.active
{
    outline:0px !important;
    -webkit-appearance:none;
    box-shadow: none !important;
}

bootstrap remove input focus outline

<div class="form-label-group">
  <input type="password" id="inputPassword" class="form-control shadow-none" placeholder="Password" required>
  <label for="inputPassword">Password</label>
</div>