Hard-deprecate global function wfShowingResults

Bug: T264980
Change-Id: If5e7aa5b975c880f41db624df3800ca04b9fea70

RELEASE-NOTES-1.40

@@ -292,6 +292,7 @@ because of Phabricator reports.
   now emits deprecation warnings.
 * IndexPager::getHookContainer is deprecated and emits deprecation warnings.
   Inject a HookContainer instead.
+* Global function wfShowingResults is deprecated and emits deprecation warnings.
 * AbstractBlock::getPermissionsError(), deprecated in 1.35, now emits
   deprecation warnings.
 * The following functions are deprecated: isBlockedGlobally, getGlobalBlock.

includes/GlobalFunctions.php

@@ -1120,11 +1120,13 @@ function wfFormatStackFrame( $frame ) {
 /**
  * @todo document
  *
+ * @deprecated with warnings since 1.40
  * @param int $offset
  * @param int $limit
  * @return string
  */
 function wfShowingResults( $offset, $limit ) {
+	wfDeprecated( __FUNCTION__, '1.40' );
 	return wfMessage( 'showingresults' )->numParams( $limit, $offset + 1 )->parse();
 }