fix(field-group,styles): use latest CSS

Author: castastrophe

.changeset/cruel-hotels-accept.md

@@ -0,0 +1,6 @@
+---
+'@spectrum-web-components/field-group': patch
+'@spectrum-web-components/styles': patch
+---
+
+Remove unnecessary system theme references to reduce complexity for components that don't need the additional mapping layer.

packages/field-group/src/field-group.css

@@ -11,16 +11,8 @@ governing permissions and limitations under the License.
 */
 
 @import url("./spectrum-field-group.css");
-@import url("./field-group-overrides.css");
 
-:host([horizontal][dir="rtl"]) slot:not([name])::slotted(*:not(:last-child)),
-:host([dir="rtl"]:not([vertical])) slot:not([name])::slotted(*:not(:last-child)) {
+:host(:not([vertical])) .group {
     /* .spectrum-FieldGroup--horizontal .spectrum-FieldGroup-item+.spectrum-FieldGroup-item */
-    margin: 0 0 0 var(--spectrum-fieldgroup-margin);
-}
-
-:host([horizontal][dir="ltr"]) slot:not([name])::slotted(*:not(:last-child)),
-:host([dir="ltr"]:not([vertical])) slot:not([name])::slotted(*:not(:last-child)) {
-    /* .spectrum-FieldGroup--horizontal .spectrum-FieldGroup-item+.spectrum-FieldGroup-item */
-    margin: 0 var(--spectrum-fieldgroup-margin) 0 0;
+    gap: var(--spectrum-spacing-300);
 }

packages/field-group/src/spectrum-field-group.css

@@ -12,7 +12,6 @@ governing permissions and limitations under the License.
 
 /* THIS FILE IS MACHINE GENERATED. DO NOT EDIT */
 .group {
-    --spectrum-fieldgroup-margin: var(--spectrum-spacing-300);
     flex-flow: column wrap;
     display: flex;
 }
@@ -39,7 +38,7 @@ governing permissions and limitations under the License.
 }
 
 :host([horizontal]) .group slot:not([name])::slotted(:not(:last-child)) {
-    margin-inline-end: var(--spectrum-fieldgroup-margin);
+    margin-inline-end: var(--spectrum-spacing-300);
 }
 
 :host([horizontal]) .group .spectrum-HelpText {