Revert "增加macos dmg软件签名 (#6541)"

This reverts commit a0d4a3f2e8.

.github/workflows/build-osx.yml

@@ -60,14 +60,6 @@ jobs:
         tag: ${{ github.event.inputs.release_tag }}
         file_glob: true
 
-    - name: Upload sha256 checksum to release
-      uses: svenstaro/upload-release-action@v2
-      if: github.event.inputs.release_tag != ''
-      with:
-        file: ${{ github.workspace }}/v2rayN*.sha256
-        tag: ${{ github.event.inputs.release_tag }}
-        file_glob: true
-
     # release zip archive
     - name: Package release zip archive
       if: github.event.inputs.release_tag != ''
@@ -83,4 +75,4 @@ jobs:
         file: ${{ github.workspace }}/v2rayN*.zip
         tag: ${{ github.event.inputs.release_tag }}
         file_glob: true
-        prerelease: true
+        prerelease: true