Removed properties from BackstagePaletteAdditions

Signed-off-by: Andre Wanlin <awanlin@rapidrtc.com>

.changeset/serious-houses-watch.md

@@ -0,0 +1,29 @@
+---
+'@backstage/theme': patch
+---
+
+Removed the following unused properties from BackstagePaletteAdditions under the `bursts` property:
+
+```ts
+slackChannelText: string;
+backgroundColor: {
+    default: string;
+};
+```
+
+If these were being used you can add them back to your custom theme, for example like this:
+
+```diff
+ bursts: {
+     fontColor: '#FEFEFE',
++    slackChannelText: '#ddd',
++    backgroundColor: {
++       default: '#7C3699',
++    },
+     gradient: {
+        linear: 'linear-gradient(-137deg, #4BB8A5 0%, #187656 100%)',
+     },
+},
+```
+
+The [Customize the look-and-feel of your App](https://backstage.io/docs/getting-started/app-custom-theme) documentation has more details on creating and using a custom theme.

packages/theme/api-report.md

@@ -53,10 +53,6 @@ export type BackstagePaletteAdditions = {
   };
   bursts: {
     fontColor: string;
-    slackChannelText: string;
-    backgroundColor: {
-      default: string;
-    };
     gradient: {
       linear: string;
     };

packages/theme/src/themes.ts

@@ -39,10 +39,6 @@ export const lightTheme = createTheme({
     },
     bursts: {
       fontColor: '#FEFEFE',
-      slackChannelText: '#ddd',
-      backgroundColor: {
-        default: '#7C3699',
-      },
       gradient: {
         linear: 'linear-gradient(-137deg, #4BB8A5 0%, #187656 100%)',
       },
@@ -116,10 +112,6 @@ export const darkTheme = createTheme({
     },
     bursts: {
       fontColor: '#FEFEFE',
-      slackChannelText: '#ddd',
-      backgroundColor: {
-        default: '#7C3699',
-      },
       gradient: {
         linear: 'linear-gradient(-137deg, #4BB8A5 0%, #187656 100%)',
       },

packages/theme/src/types.ts

@@ -65,10 +65,6 @@ export type BackstagePaletteAdditions = {
   };
   bursts: {
     fontColor: string;
-    slackChannelText: string;
-    backgroundColor: {
-      default: string;
-    };
     gradient: {
       linear: string;
     };