utils: remove -BuildTo feature from build.ps1

This feature never really was used in the CI systems as it was intended.
It was meant to allow doing partial builds for smoke testing. However,
we have a much better solution for that now: docker. Remove this feature
that is underutilized.

Author: compnerd

utils/build.ps1

@@ -93,10 +93,6 @@ An array of names of projects to run tests for.
 .PARAMETER Stage
 The path to a directory where built msi's and the installer executable should be staged (for CI).
 
-.PARAMETER BuildTo
-The name of a build step after which the script should terminate.
-For example: -BuildTo ToolsSupportCore
-
 .PARAMETER ToBatch
 When set, runs the script in a special mode which outputs a listing of command invocations
 in batch file format instead of executing them.
@@ -150,15 +146,6 @@ param
   [switch] $IncludeDS2 = $false,
   [string[]] $Test = @(),
   [string] $Stage = "",
-  [ValidateSet("ArgumentParser", "ASN1", "BuildTools", "Certificates", "CMark",
-    "Collections", "Compilers", "Crypto", "CURL", "Dispatch", "DocC", "Driver",
-    "DS2", "ExperimentalRuntime", "Format", "Foundation", "FoundationMacros",
-    "IndexStoreDB", "Inspect", "Installer", "LLBuild", "LLVM", "LMDB",
-    "Markdown", "mimalloc", "PackageManager", "PlatformInfoPlist", "RegsGen2",
-    "Runtime", "Sanitizers", "SDKSettingsPlist", "SourceKitLSP", "SQLite",
-    "System", "Testing", "TestingMacros", "ToolsSupportCore", "XCTest", "XML2",
-    "ZLib")]
-  [string] $BuildTo = "",
   [ValidateSet("AMD64", "ARM64")]
   [string] $HostArchName = $(if ($env:PROCESSOR_ARCHITEW6432) { $env:PROCESSOR_ARCHITEW6432 } else { $env:PROCESSOR_ARCHITECTURE }),
   [ValidateSet("Asserts", "NoAsserts")]
@@ -594,9 +581,6 @@ function Invoke-BuildStep {
   if ($Summary) {
     Add-TimingData $Platform $Name $Stopwatch.Elapsed
   }
-  if ($Name.Replace("Build-", "") -eq $BuildTo) {
-    exit 0
-  }
 }
 
 enum Project {