Removes unneeded mirror. (#4995)

.azure-pipelines/publish-nightly.yml

@@ -84,7 +84,6 @@ extends:
             inputs:
               versionSource: fromFile
               versionFilePath: .nvmrc
-              nodejsMirror: https://github.com/joaomoreno/node-mirror/releases/download
 
           - script: npm ci
             displayName: Install NPM dependencies

.azure-pipelines/publish-stable.yml

@@ -68,7 +68,6 @@ extends:
             inputs:
               versionSource: fromFile
               versionFilePath: .nvmrc
-              nodejsMirror: https://github.com/joaomoreno/node-mirror/releases/download
 
           - script: npm ci
             displayName: Install NPM dependencies