diff --git a/sources/Forms/Block/Base/ExpressionFormBlock.php b/sources/Forms/Block/Base/ExpressionFormBlock.php
deleted file mode 100644
index 1401caf68..000000000
--- a/sources/Forms/Block/Base/ExpressionFormBlock.php
+++ /dev/null
@@ -1,96 +0,0 @@
-<?php
-/*
- * @copyright   Copyright (C) 2010-2025 Combodo SAS
- * @license     http://opensource.org/licenses/AGPL-3.0
- */
-
-namespace Combodo\iTop\ItopSdkFormDemonstrator\Form\Block;
-
-use Combodo\iTop\Forms\Block\AbstractFormBlock;
-use Combodo\iTop\Forms\Block\IO\Format\BooleanIOFormat;
-use Combodo\iTop\Forms\Block\IO\Format\RawFormat;
-use Combodo\iTop\Forms\FormsException;
-use IssueLog;
-use Symfony\Component\Form\FormEvents;
-
-class ExpressionFormBlock extends AbstractFormBlock
-{
-	const OUTPUT_RESULT = "result";
-
-	public function InitBlockOptions(array &$aUserOptions): void
-	{
-		parent::InitBlockOptions($aUserOptions);
-	}
-
-	public function InitOutputs(): void
-	{
-		parent::InitOutputs();
-		$this->AddOutput(self::OUTPUT_RESULT, BooleanIOFormat::class);
-//		$this->AddOutput(self::OUTPUT_RAW, RawFormat::class);
-	}
-
-//	public function InputHasChanged()
-//	{
-//		if (!$this->IsInputsDataReady()) {
-//			return;
-//		}
-//		$sExpression = $this->GetOptions()['expression'];
-//		$sValue = preg_replace_callback(
-//			"/\[\[(?<input>[^\]]+)]]/",
-//			function(array $aMatches): string {
-//				return $this->GetInput($aMatches['input'])->GetValue();
-//			},
-//			$sExpression);
-//
-//		foreach ($this->GetInputs() as $oFormInput) {
-//			IssueLog::Info($oFormInput->GetName().' = '.$oFormInput->GetValue());
-//		}
-//		IssueLog::Info("Result of [$sExpression] is [$sValue]");
-//
-//		$result  = '';
-//		eval('$result = '.$sValue.';');
-//		IssueLog::Info("Result of [$sExpression] is eval to [$result]");
-//
-//		$this->GetOutput(self::OUTPUT_RESULT)->SetValue(FormEvents::POST_SUBMIT, new BooleanIOFormat($result));
-//		$this->GetOutput(self::OUTPUT_VALUE)->SetValue(FormEvents::POST_SUBMIT, new RawFormat($result));
-//	}
-
-
-
-	public function InputHasChanged()
-	{
-		if (!$this->IsInputsDataReady()) {
-			return;
-		}
-		$sExpression = $this->GetOptions()['expression'];
-
-		$this->Compute($sExpression, FormEvents::POST_SET_DATA);
-		$this->Compute($sExpression, FormEvents::POST_SUBMIT);
-	}
-
-	public function Compute(string $sExpression, string $sEventType): void
-	{
-		try{
-			$sValue = preg_replace_callback(
-				"/\[\[(?<input>[^\]]+)]]/",
-				function(array $aMatches) use ($sEventType): ?string {
-					$oInput = $this->GetInput($aMatches['input']);
-					if(!$oInput->HasEventValue($sEventType)){
-						throw new FormsException('Unable to compute expression: input '.$aMatches['input'].' has no value for event '.$sEventType.'.');
-					}
-					return $oInput->GetValue($sEventType);
-				},
-				$sExpression);
-
-			$result  = '';
-			eval('$result = '.$sValue.';');
-
-			$this->GetOutput(self::OUTPUT_RESULT)->SetValue($sEventType, new BooleanIOFormat($result));
-			$this->GetOutput(self::OUTPUT_VALUE)->SetValue($sEventType, new RawFormat($result));
-		}
-		catch(\Exception $e){
-			IssueLog::Exception('Compute expression block issue', $e);
-		}
-	}
-
-}
\ No newline at end of file