fix(vselect): prevent chips from changing field size

Fields were growing when chips were added, because chips are 26px. Adjusted margins to compensate

fix vuetifyjs#15980

packages/vuetify/src/components/VSelect/VSelect.sass

@@ -4,10 +4,6 @@
 @use '../../styles/tools'
 @use './variables' as *
 
-@at-root
-  @include tools.density('v-input', $select-chips-margin-bottom) using ($modifier)
-    --select-chips-margin-bottom: #{0px + math.div($modifier, 2)}
-
 .v-select
   .v-field
     .v-text-field__prefix,
@@ -62,8 +58,8 @@
 
   &--chips
     .v-select__selection
-      margin-top: $select-chips-margin-top
-      margin-bottom: var(--select-chips-margin-bottom)
+      margin-top: -1px
+      margin-bottom: -1px
 
       &:first-child
         margin-inline-start: 0

packages/vuetify/src/components/VSelect/_variables.scss

@@ -6,5 +6,3 @@ $select-content-elevation: 4 !default;
 $select-line-height: 1.75 !default;
 $select-transition: .2s settings.$standard-easing !default;
 $select-chips-control-min-height: 64px !default;
-$select-chips-margin-top: 2px !default;
-$select-chips-margin-bottom: ('default': 0, 'comfortable': 1, 'compact': 2) !default;