Remove code for installing UCRT on Windows 7/8.

This almost completely reverts commit
428a2fb ("Don't bundle UCRT runtime on
Windows").

Windows 10 is required since 90b367d
and UCRT is guaranteed to exist on the system.

win32/poedit.iss

@@ -204,8 +204,6 @@ Name: "ukrainian"; MessagesFile: "compiler:Languages\Ukrainian.isl"
 [CustomMessages]
 OpenAfterInstall=Open Poedit after installation
 Uninstall32bit=Uninstalling 32-bit version of Poedit...
-DownloadingUCRT=Poedit needs to download and install Microsoft Universal C Runtime support files, because they are missing on your computer.
-InstallingUCRT=Installing Microsoft Universal C Runtime...
 brazilianportuguese.OpenAfterInstall=Abrir o Poedit após a instalação
 catalan.OpenAfterInstall=Obre el Poedit després de la instal·lació
 corsican.OpenAfterInstall=Apre Poedit dopu à l'installazione
@@ -263,96 +261,11 @@ begin
 end;
 
 
-{ -- Install UCRT on ancient Windows 7/8 -- }
-
-var
-  DownloadPage: TDownloadWizardPage;
-  UCRTFilename, UCRTSha256: String;
-
-
-procedure PrepareUCRTDownloadIfNeeded;
-var
-  Version: TWindowsVersion;
-begin
-  DownloadPage := nil;
-  { Windows 10 always includes UCRT, older versions may or may not have it installed }
-  GetWindowsVersionEx(Version);
-  if (Version.Major = 6) then begin
-    if (not FileExists(ExpandConstant('{sys}\ucrtbase.dll'))) then begin
-      if (Version.Minor = 1) then begin
-        UCRTFilename := 'Windows6.1-KB3118401-x64.msu';
-        UCRTSha256 := '145623e0b85037b90e1ef5c45aee1aaa4120c4d12a388d94c48cfbb083e914e4';
-      end
-      else if (Version.Minor = 2) then begin
-        UCRTFilename := 'Windows8-RT-KB3118401-x64.msu';
-        UCRTSha256 := 'fc2fb2dd6f25739f7e0938b9d24fe590ee03e62de3b4132193f424f0bbb8b0fd';
-      end
-      else if (Version.Minor = 3) then begin
-        UCRTFilename := 'Windows8.1-KB3118401-x64.msu';
-        UCRTSha256 := '0e44ad74aa341909865dc6a72b2bcb80564fcd0df7e1e388be81a7e04868c98f';
-      end;
-      if (UCRTFilename <> '') then
-        DownloadPage := CreateDownloadPage(SetupMessage(msgWizardPreparing), CustomMessage('DownloadingUCRT'), nil);
-	  end;
-  end;
-end;
-
-
-function DownloadUCRTIfNeeded(): Boolean;
-begin
-  Result := True;
-  if (DownloadPage <> nil) then begin
-    DownloadPage.Clear;
-    DownloadPage.Add('https://download.poedit.net/ucrt/' + UCRTFilename, UCRTFilename, UCRTSha256);
-    DownloadPage.Show;
-    try
-      try
-        DownloadPage.Download;
-      except
-        if DownloadPage.AbortedByUser then
-          Log('UCRT download aborted by user.')
-        else
-          SuppressibleMsgBox(AddPeriod(GetExceptionMessage), mbCriticalError, MB_OK, IDOK);
-        Result := False;
-      end;
-    finally
-      DownloadPage.Hide;
-    end;
-  end;
-end;
-
-
-procedure InstallUCRTIfNeeded;
-var
-  ResultCode: Integer;
-begin
-  if (UCRTFilename <> '') then begin
-    WizardForm.StatusLabel.Caption := CustomMessage('InstallingUCRT');
-    Exec('wusa.exe', UCRTFilename + ' /quiet /norestart', ExpandConstant('{tmp}'), SW_SHOWNORMAL, ewWaitUntilTerminated, ResultCode);
-  end;
-end;
-
-
 { -- Inno Setup hooks -- }
 
-procedure InitializeWizard;
-begin
-  PrepareUCRTDownloadIfNeeded();
-end;
-
-function NextButtonClick(CurPageID: Integer): Boolean;
-begin
-  if (CurPageID = wpReady) then
-    Result := DownloadUCRTIfNeeded()
-  else
-    Result := True;
-  
-end;
-
 procedure CurStepChanged(CurStep: TSetupStep);
 begin
   if (CurStep = ssInstall) then begin
-    InstallUCRTIfNeeded();
     Uninstall32bitVersionIfPresent();
   end;
 end;