Remove Nightlies (#44830)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/44830

Now that we have nightlies in GHA, we can safely remove them from CCI.

## Changelog:
[Internal] - Remove Nightlies from CCI

## Facebook:
Once this land, we need to disable the trigger in the CCI setting page.

Reviewed By: cortinico

Differential Revision: D58284941

fbshipit-source-id: 9a6ceb416de1d54f59f784a61509cd93f5684aaf

.circleci/configurations/workflows.yml

@@ -87,40 +87,3 @@ workflows:
 
       # Run code checks on PRs
       - analyze_pr
-
-  nightly:
-    when: << pipeline.parameters.run_nightly_workflow >>
-    jobs:
-      - prepare_hermes_workspace
-      - build_android:
-          release_type: "nightly"
-      - build_hermesc_linux:
-          requires:
-            - prepare_hermes_workspace
-      - build_hermesc_apple:
-          requires:
-            - prepare_hermes_workspace
-      - build_apple_slices_hermes:
-          requires:
-            - build_hermesc_apple
-          matrix:
-            parameters:
-              flavor: ["Debug", "Release"]
-              slice: ["macosx", "iphoneos", "iphonesimulator", "catalyst"]
-      - build_hermesc_windows:
-          requires:
-            - prepare_hermes_workspace
-      - build_hermes_macos:
-          requires:
-            - build_apple_slices_hermes
-          matrix:
-            parameters:
-              flavor: ["Debug", "Release"]
-      - build_npm_package:
-          name: build_nightly_npm_package
-          release_type: "nightly"
-          requires:
-            - build_android
-            - build_hermesc_linux
-            - build_hermes_macos
-            - build_hermesc_windows