remove unused env var

* DOTNET_SKIP_FIRST_TIME_EXPERIENCE

eng/common/tools.ps1

@@ -157,9 +157,6 @@ function InitializeDotNetCli([bool]$install, [bool]$createSdkLocationFile) {
  # Don't resolve runtime, shared framework, or SDK from other locations to ensure build determinism
  $env:DOTNET_MULTILEVEL_LOOKUP=0
 
- # Disable first run since we do not need all ASP.NET packages restored.
- $env:DOTNET_SKIP_FIRST_TIME_EXPERIENCE=1
-
  # Disable telemetry on CI.
  if ($ci) {
  $env:DOTNET_CLI_TELEMETRY_OPTOUT=1
@@ -231,7 +228,6 @@ function InitializeDotNetCli([bool]$install, [bool]$createSdkLocationFile) {
  Write-PipelinePrependPath -Path $dotnetRoot
 
  Write-PipelineSetVariable -Name 'DOTNET_MULTILEVEL_LOOKUP' -Value '0'
- Write-PipelineSetVariable -Name 'DOTNET_SKIP_FIRST_TIME_EXPERIENCE' -Value '1'
 
  return $global:_DotNetInstallDir = $dotnetRoot
 }

eng/common/tools.sh

@@ -111,9 +111,6 @@ function InitializeDotNetCli {
  # Don't resolve runtime, shared framework, or SDK from other locations to ensure build determinism
  export DOTNET_MULTILEVEL_LOOKUP=0
 
- # Disable first run since we want to control all package sources
- export DOTNET_SKIP_FIRST_TIME_EXPERIENCE=1
-
  # Disable telemetry on CI
  if [[ $ci == true ]]; then
  export DOTNET_CLI_TELEMETRY_OPTOUT=1
@@ -165,7 +162,6 @@ function InitializeDotNetCli {
  Write-PipelinePrependPath -path "$dotnet_root"
 
  Write-PipelineSetVariable -name "DOTNET_MULTILEVEL_LOOKUP" -value "0"
- Write-PipelineSetVariable -name "DOTNET_SKIP_FIRST_TIME_EXPERIENCE" -value "1"
 
  # return value
  _InitializeDotNetCli="$dotnet_root"

eng/restore-toolset.ps1

@@ -43,7 +43,6 @@ function CreateBuildEnvScript()
  $scriptContents = @"
 @echo off
 title SDK Build ($RepoRoot)
-set DOTNET_SKIP_FIRST_TIME_EXPERIENCE=1
 set DOTNET_MULTILEVEL_LOOKUP=0
 
 set DOTNET_ROOT=$env:DOTNET_INSTALL_DIR

eng/restore-toolset.sh

@@ -57,7 +57,6 @@ function CreateBuildEnvScript {
  scriptPath="$artifacts_dir/sdk-build-env.sh"
  scriptContents="
 #!/bin/bash
-export DOTNET_SKIP_FIRST_TIME_EXPERIENCE=1
 export DOTNET_MULTILEVEL_LOOKUP=0
 
 export DOTNET_ROOT=$DOTNET_INSTALL_DIR

src/Tests/Microsoft.NET.TestFramework/TestContext.cs

@@ -61,8 +61,6 @@ public void AddTestEnvironmentVariables(SdkCommandSpec command)
  // Set NUGET_PACKAGES environment variable to match value from build.ps1
  command.Environment["NUGET_PACKAGES"] = NuGetCachePath;
 
- command.Environment["DOTNET_SKIP_FIRST_TIME_EXPERIENCE"] = "1";
-
  command.Environment["GenerateResourceMSBuildArchitecture"] = "CurrentArchitecture";
  command.Environment["GenerateResourceMSBuildRuntime"] = "CurrentRuntime";
 

src/Tests/dotnet-watch.Tests/Utilities/AwaitableProcess.cs

@@ -51,7 +51,6 @@ public void Start()
  var processStartInfo = _spec.GetProcessStartInfo();
  processStartInfo.RedirectStandardOutput = true;
  processStartInfo.RedirectStandardError = true;
- processStartInfo.Environment["DOTNET_SKIP_FIRST_TIME_EXPERIENCE"] = "true";
 
  _process = new Process
  {

src/WebSdk/Publish/Tasks/Tasks/GenerateEFSQLScripts.cs

@@ -76,13 +76,10 @@ private void InitializeProperties()
  private int _processExitCode;
  private StringBuilder _standardOut = new StringBuilder();
  private StringBuilder _standardError = new StringBuilder();
- private const string SkipFirstTimeEnvironmentVariable = "DOTNET_SKIP_FIRST_TIME_EXPERIENCE";
  private const string AspNetCoreEnvironment = "ASPNETCORE_ENVIRONMENT";
  private bool GenerateSQLScript(string sqlFileFullPath, string dbContextName, bool isLoggingEnabled = true)
  {
- string previousSkipValue = Environment.GetEnvironmentVariable(SkipFirstTimeEnvironmentVariable);
  string previousAspNetCoreEnvironment = Environment.GetEnvironmentVariable(AspNetCoreEnvironment); 
- Environment.SetEnvironmentVariable(SkipFirstTimeEnvironmentVariable, "true");
  Environment.SetEnvironmentVariable(AspNetCoreEnvironment, "Development");
  ProcessStartInfo psi = new ProcessStartInfo("dotnet", $@"ef migrations script --no-build --idempotent --configuration {Configuration} --output ""{sqlFileFullPath}"" --context {dbContextName} {EFMigrationsAdditionalArgs}")
  {
@@ -128,7 +125,6 @@ private bool GenerateSQLScript(string sqlFileFullPath, string dbContextName, boo
  isProcessExited = proc.WaitForExit(300000);
  }
 
- Environment.SetEnvironmentVariable(SkipFirstTimeEnvironmentVariable, previousSkipValue);
  Environment.SetEnvironmentVariable(AspNetCoreEnvironment, previousAspNetCoreEnvironment);
  if (!isProcessExited || _processExitCode != 0)
  {