change method to remove shadow of input and button

src/client/styles/scss/_override-bootstrap-variables.scss

@@ -39,6 +39,7 @@ $border-radius-small: 0;
 $btn-border-radius: 0;
 $btn-border-radius-lg: 0;
 $btn-border-radius-sm: 0;
+$btn-focus-width: 0px;
 
 
 
@@ -47,6 +48,7 @@ $btn-border-radius-sm: 0;
 $input-border-radius: 0;
 $input-border-radius-lg: 0;
 $input-border-radius-sm: 0;
+$input-focus-box-shadow: none;
 
 //== Navs
 

src/client/styles/scss/_override-bootstrap.scss

@@ -161,15 +161,6 @@ fieldset[disabled] .btn {
   cursor: not-allowed;
 }
 
-// input form (disabled box-shadow added in bootstrap4)
-form.form-group input.form-control {
-  &:focus,
-  &.focus {
-    border-color: inherit;
-    box-shadow: none;
-  }
-}
-
 // progress bar
 .progress {
   margin-bottom: 18px;