Remove SinglePrintSafeguardFeature (#5839)

Task/Issue URL:
https://app.asana.com/0/1200204095367872/1209845978495318/f

### Description

- Removes the SinglePrintSafeguardFeature killswitch.

### Steps to test this PR

- [x] Go to a page and select "Print page" ("Save as PDF" is
convenient).
- [x] Verify that the page is printed successfully.

Author: joshliebe

app/src/main/java/com/duckduckgo/app/browser/BrowserTabFragment.kt

@@ -146,7 +146,6 @@ import com.duckduckgo.app.browser.omnibar.experiments.FadeOmnibarItemPressedList
 import com.duckduckgo.app.browser.omnibar.getOmnibarType
 import com.duckduckgo.app.browser.print.PrintDocumentAdapterFactory
 import com.duckduckgo.app.browser.print.PrintInjector
-import com.duckduckgo.app.browser.print.SinglePrintSafeguardFeature
 import com.duckduckgo.app.browser.remotemessage.SharePromoLinkRMFBroadCastReceiver
 import com.duckduckgo.app.browser.session.WebViewSessionStorage
 import com.duckduckgo.app.browser.shortcut.ShortcutBuilder
@@ -519,9 +518,6 @@ class BrowserTabFragment :
     @Inject
     lateinit var newTabPageProvider: NewTabPageProvider
 
-    @Inject
-    lateinit var singlePrintSafeguardFeature: SinglePrintSafeguardFeature
-
     @Inject
     lateinit var safeWebViewFeature: SafeWebViewFeature
 
@@ -4270,15 +4266,11 @@ class BrowserTabFragment :
         (activity?.getSystemService(Context.PRINT_SERVICE) as? PrintManager)?.let { printManager ->
             webView?.createSafePrintDocumentAdapter(url)?.let { webViewPrintDocumentAdapter ->
 
-                val printAdapter = if (singlePrintSafeguardFeature.self().isEnabled()) {
-                    PrintDocumentAdapterFactory.createPrintDocumentAdapter(
-                        webViewPrintDocumentAdapter,
-                        onStartCallback = { viewModel.onStartPrint() },
-                        onFinishCallback = { viewModel.onFinishPrint() },
-                    )
-                } else {
-                    webViewPrintDocumentAdapter
-                }
+                val printAdapter = PrintDocumentAdapterFactory.createPrintDocumentAdapter(
+                    webViewPrintDocumentAdapter,
+                    onStartCallback = { viewModel.onStartPrint() },
+                    onFinishCallback = { viewModel.onFinishPrint() },
+                )
                 printManager.print(
                     url,
                     printAdapter,