diff --git a/.github/workflows/main_ci.yml b/.github/workflows/main_ci.yml
index c92934195d1..afdeb700e55 100644
--- a/.github/workflows/main_ci.yml
+++ b/.github/workflows/main_ci.yml
@@ -24,10 +24,6 @@ jobs:
         os: [ubuntu-24.04, windows-2022]
     steps:
     - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
-    - uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6.3.0
-      with:
-        node-version: "15"
-        package-manager-cache: false
     - uses: ./.github/actions/setup-dotnet
     - name: Build
       # See pr_ci.yml for the reason why we disable NuGet audit warnings.
diff --git a/.github/workflows/pr_ci.yml b/.github/workflows/pr_ci.yml
index 5fd8b69f520..721d276d143 100644
--- a/.github/workflows/pr_ci.yml
+++ b/.github/workflows/pr_ci.yml
@@ -18,10 +18,6 @@ jobs:
     name: Build & Test
     steps:
     - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
-    - uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6.3.0
-      with:
-        node-version: "15"
-        package-manager-cache: false
     - uses: ./.github/actions/setup-dotnet
     - name: Build
       # We disable NuGet audit warnings, see https://learn.microsoft.com/en-us/nuget/reference/errors-and-warnings/nu1901-nu1904.
diff --git a/.github/workflows/preview_ci.yml b/.github/workflows/preview_ci.yml
index ca20f38f11d..c38dba47657 100644
--- a/.github/workflows/preview_ci.yml
+++ b/.github/workflows/preview_ci.yml
@@ -23,11 +23,6 @@ jobs:
         Write-Output "Commits found in the last 24 hours: $hasCommitFromLastDay."
         $shouldPublish = ($hasCommitFromLastDay -and '${{ github.event_name }}' -eq 'schedule') -or ('${{ github.event_name }}' -eq 'workflow_dispatch')
         "should-publish=$($shouldPublish ? 'true' : 'false')" >> $Env:GITHUB_OUTPUT
-    - uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6.3.0
-      if: steps.check-publish.outputs.should-publish == 'true'
-      with:
-        node-version: "15"
-        package-manager-cache: false
     - uses: ./.github/actions/setup-dotnet
       if: steps.check-publish.outputs.should-publish == 'true'
     - name: Set build number
diff --git a/.github/workflows/release_ci.yml b/.github/workflows/release_ci.yml
index 57004597417..0595b46f070 100644
--- a/.github/workflows/release_ci.yml
+++ b/.github/workflows/release_ci.yml
@@ -28,10 +28,6 @@ jobs:
           echo "VERSION=${VERSION}" >> $GITHUB_OUTPUT
       shell: bash
     - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
-    - uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6.3.0
-      with:
-        node-version: "15"
-        package-manager-cache: false
     - uses: ./.github/actions/setup-dotnet
     - name: Set build number 
       if: matrix.os == 'ubuntu-24.04'