[REF] web: remove useless statusbar css rules from form view css

These rules no longer apply because they use a direct descendant
selector which no longer matches since field widgets now have an extra
div. These rules also already exist in the statusbar_field.scss file.

Part-of: odoo/odoo#96598

addons/web/static/src/views/form/form_controller.scss

@@ -227,75 +227,6 @@ $o-form-label-margin-right: 0px;
             }
         }
 
-        > .o_statusbar_status {
-            margin-left: auto;
-            flex-flow: row-reverse wrap-reverse;
-            align-self: stretch;
-            align-items: stretch;
-
-            > .o_arrow_button {
-                min-height: $o-statusbar-height;
-                position: relative;
-                padding-left: $o-statusbar-arrow-width*2;
-                border-width: 0;
-                font-size: $font-size-sm;
-
-                &:first-child {
-                    padding-right: $o-horizontal-padding; // Compensate container padding
-                    overflow-x: hidden; // to prevent horizontal scroll due to last arrow
-                }
-                &:last-child {
-                    padding-left: $o-horizontal-padding - 1;
-
-                    &:not(.disabled) {
-                        border-left: 1px solid $border-color;
-                    }
-                }
-
-                &:not(:first-child):before, &:not(:first-child):after {
-                    content: " ";
-                    display: block;
-                    @include o-position-absolute(0, -$o-statusbar-arrow-width + 1);
-
-                    border-top: floor($o-statusbar-height/2) solid transparent;
-                    border-bottom: ceil($o-statusbar-height/2) solid transparent;
-                    border-right: none;
-                    border-left: $o-statusbar-arrow-width solid $o-view-background-color;
-                    -moz-transform: scale(0.9999); // Smooth the triangle on firefox
-                }
-
-                &:not(:first-child):before {
-                    right: -$o-statusbar-arrow-width;
-                    border-left-color: map-get($grays, '300');
-                }
-
-                &.disabled {
-                    opacity: 1;
-                    pointer-events: none;
-                    cursor: default;
-
-                    &:not(.btn-primary) {
-                        &, &:hover, &:focus {
-                            color: $text-muted;
-                        }
-                    }
-                }
-
-                &.btn-primary.disabled {
-                    background-color: $o-brand-odoo;
-                    color: color-yiq($o-brand-odoo);
-
-                    &:after, &:before {
-                        border-left-color: $o-brand-odoo;
-                    }
-
-                    + .o_arrow_button:before {
-                        display: none;
-                    }
-                }
-            }
-        }
-
         // Touch device mode
         > .o_statusbar_buttons > .btn-group, > .o_statusbar_status {
             > .dropdown-toggle {