Closes #15236: Clean up unused static resources (#15539)

* Remove unused images

* Remove unused stylesheets

netbox/project-static/styles/old/theme-light.scss

@@ -1,119 +0,0 @@
-// Base NetBox Theme Overrides and Settings - color mode agnostic.
-
-@import '../../node_modules/bootstrap/scss/functions';
-
-$card-cap-bg: 'unset';
-
-$border-radius-md: 0.375rem;
-$border-radius-lg: 0.5rem;
-$border-radius-xl: 0.75rem;
-$border-radius-2xl: 1.5rem;
-
-$border-radius: $border-radius-md;
-
-$border-radius-sm: $border-radius;
-$border-radius-lg: $border-radius-xl;
-
-$badge-border-radius: $border-radius-md;
-$progress-border-radius: $border-radius-md;
-
-$font-weight-lighter: 200;
-$font-weight-medium: 600;
-$font-weight-bolder: 800;
-
-$font-size-xs: 0.75rem;
-
-$line-height-base: 1.5;
-$line-height-xs: 1;
-$line-height-sm: 1.25;
-$line-height-lg: 1.75;
-
-$darker: #1b1f22;
-$darkest: #171b1d;
-
-@import '../../node_modules/bootstrap/scss/variables';
-@import '../../node_modules/bootstrap/scss/variables-dark';
-
-// This is the same value as the default from Bootstrap, but it needs to be in scope prior to
-// importing _variables.scss from Bootstrap.
-$btn-close-width: 1em;
-
-$accordion-padding-y: 0.8125rem;
-$accordion-padding-x: 0.8125rem;
-
-$sidebar-width: 280px;
-$sidebar-bottom-height: 4rem;
-
-$transition-100ms-ease-in-out: all 0.1s ease-in-out;
-
-// Sidebar/Sidenav
-$sidenav-width-closed: 3rem;
-$sidenav-width-open: 16rem;
-$sidenav-icon-width: 2rem;
-$sidenav-spacing-x: 1.5rem;
-$sidenav-link-spacing-x: 1rem;
-$sidenav-link-spacing-y: 0.5rem;
-
-// Theme colors (BS5 classes)
-$primary: #337ab7;
-$secondary: $gray-600;
-$success: $green-500;
-$info: #54d6f0;
-$warning: $yellow-500;
-$danger: $red-500;
-$light: $gray-200;
-$dark: $gray-800;
-
-$theme-colors: (
-  // BS5 theme colors
-  'primary': $primary,
-  'secondary': $secondary,
-  'success': $success,
-  'info': $info,
-  'warning': $warning,
-  'danger': $danger,
-  'light': $light,
-  'dark': $dark,
-  // General-purpose palette
-  'blue': $blue-500,
-  'indigo': $indigo-500,
-  'purple': $purple-500,
-  'pink': $pink-500,
-  'red': $red-500,
-  'orange': $orange-500,
-  'yellow': $yellow-500,
-  'green': $green-500,
-  'teal': $teal-500,
-  'cyan': $cyan-500,
-  'gray': $gray-500,
-  'black': $black,
-  'white': $white
-);
-
-$light: $gray-200;
-
-$navbar-light-color: $gray-100;
-
-$card-cap-color: $gray-800;
-
-$accordion-bg: transparent;
-$accordion-button-bg: $accordion-bg;
-$accordion-body-active-bg: $gray-100;
-$accordion-border-color: $border-color;
-$accordion-button-active-bg: $blue-100;
-$accordion-button-active-color: $gray-800;
-
-$breadcrumb-divider: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='8' height='8'%3E%3Cpath d='M2.5 0L1 1.5 3.5 4 1 6.5 2.5 8l4-4-4-4z' fill='currentColor'/%3E%3C/svg%3E");
-
-$code-color: $gray-900;
-
-$list-group-color: $gray-700;
-$list-group-disabled-color: $gray-500;
-
-$table-flush-header-bg: $gray-100;
-
-$input-placeholder-color: $gray-500;
-$form-select-disabled-color: $gray-600;
-
-// Tabbed content
-$tab-content-bg: $gray-100;

netbox/project-static/styles/svg/cable_trace.scss

@@ -1,17 +1,21 @@
-@import '../old/theme-light';
+@import '../../node_modules/bootstrap/scss/functions';
+@import '../../node_modules/bootstrap/scss/variables';
+@import '../../node_modules/bootstrap/scss/variables-dark';
 
-// Cable Trace Styles.
+/*
+ * Cable trace SVG styling
+ */
 
 :root {
-  // Light Mode Variables.
+  // Light mode values
   --nbx-trace-color: #{$black};
   --nbx-trace-node-bg: #{$gray-200};
   --nbx-trace-termination-bg: #{$gray-100};
   --nbx-trace-cable-shadow: #{$gray-800};
   --nbx-trace-attachment: #{$gray-400};
-  &[data-netbox-color-mode='dark'] {
-    // Dark Mode Variables.
-    // Note: only the `theme-light.scss` file is in-scope for simplicity.
+
+  &[data-bs-theme='dark'] {
+    // Dark mode values
     --nbx-trace-color: #{$white};
     --nbx-trace-node-bg: #{$gray-900};
     --nbx-trace-termination-bg: #{$gray-800};

netbox/project-static/styles/svg/rack_elevation.scss

@@ -1,9 +1,13 @@
-@import '../old/theme-light';
+@import '../../node_modules/bootstrap/scss/functions';
+@import '../../node_modules/bootstrap/scss/variables';
+@import '../../node_modules/bootstrap/scss/variables-dark';
 
-// Rack Elevation Styles.
+/*
+ * Rack elevation SVG styling
+ */
 
 svg {
-  // Light Mode Variables.
+  // Light mode values
   --nbx-rack-bg: #{$gray-200};
   --nbx-rack-border: #{$black};
   --nbx-rack-slot-bg: #{$gray-200};
@@ -12,9 +16,8 @@ svg {
   --nbx-rack-link-color: #{$blue};
   --nbx-rack-unit-color: #{$text-muted};
 
-  &[data-netbox-color-mode='dark'] {
-    // Dark Mode Variables.
-    // Note: only the `theme-light.scss` file is in-scope for simplicity.
+  &[data-bs-theme='dark'] {
+    // Dark mode values
     --nbx-rack-bg: #{$gray-800};
     --nbx-rack-border: #{$gray-600};
     --nbx-rack-slot-bg: #{$gray-800};
@@ -41,7 +44,7 @@ svg {
   // Rack unit numbers along left side of rack elevation.
   .unit {
     margin: 0;
-    padding: 5px 0px;
+    padding: 5px 0;
     // Rack unit text color.
     fill: var(--nbx-rack-unit-color);
   }