fix(themes): drop stub waybar.css whole-swaps — four themes ran an unstyled bar (item 28)

catppuccin, lumon, nord and retro-82 carried 2-14 line waybar.css
stubs from the rewrite import (f211ef0). A theme waybar.css replaces
the entire generated stylesheet, so those four shipped a raw default
Waybar: no workspace pill, cramped flush-edge right cluster, none of
the generated polish. Deleting the stubs falls them back to the
generated bar in their own palette; their full ~110-line rofi.rasi
designs are untouched. Authored whole-swap bars remain only
summer-day/night.

V2: lumon captured before/after — stub bar was default-styled,
re-capture renders the generated styling. flake check green.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

themes/catppuccin/waybar.css

@@ -1,2 +0,0 @@
-@define-color foreground #cdd6f4;
-@define-color background #181824;

themes/lumon/waybar.css

@@ -1,2 +0,0 @@
-@define-color foreground #d6e2ee;
-@define-color background #213442;

themes/nord/waybar.css

@@ -1,14 +0,0 @@
-@define-color background #2e3440;
-@define-color foreground #d8dee9;
-@define-color accent #88c0d0;
-
-/* Base style for Nord */
-* {
-  font-family: JetBrainsMono Nerd Font, FontAwesome;
-  font-size: 13px;
-}
-
-window#waybar {
-  background-color: @background;
-  color: @foreground;
-}

themes/retro-82/waybar.css

@@ -1,3 +0,0 @@
-@define-color bg #00172e;
-@define-color foreground #f6dcac;
-@define-color background alpha(@bg, 0.8);