fix(waybar): stop summer themes rendering phantom workspaces

summer-day/summer-night showed all 10 workspace icons up-front. The cause:
legacy used the deprecated `persistent_workspaces` (underscore), which
current Waybar silently ignores — so legacy only ever showed *existing*
workspaces. The v1 port rewrote it to the modern `persistent-workspaces`
(hyphen), which Waybar honours, surfacing all ten as phantoms.

Drop the block from both summer waybar.jsonc whole-swaps. The other themes
render from waybar.nix, which never declared persistent-workspaces, so they
already only show existing workspaces — no change needed there.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

themes/summer-day/waybar.jsonc

@@ -18,11 +18,7 @@
     "all-outputs": true,
     "on-click": "activate",
     "on-scroll-up": "hyprctl dispatch workspace e+1",
-    "on-scroll-down": "hyprctl dispatch workspace e-1",
-    "persistent-workspaces": {
-      "1": [], "2": [], "3": [], "4": [], "5": [],
-      "6": [], "7": [], "8": [], "9": [], "10": []
-    }
+    "on-scroll-down": "hyprctl dispatch workspace e-1"
   },
 
   "custom/launcher": {

themes/summer-night/waybar.jsonc

@@ -18,11 +18,7 @@
     "all-outputs": true,
     "on-click": "activate",
     "on-scroll-up": "hyprctl dispatch workspace r+1",
-    "on-scroll-down": "hyprctl dispatch workspace r-1",
-    "persistent-workspaces": {
-      "1": [], "2": [], "3": [], "4": [], "5": [],
-      "6": [], "7": [], "8": [], "9": [], "10": []
-    }
+    "on-scroll-down": "hyprctl dispatch workspace r-1"
   },
 
   "custom/nomarchy": {