Remove dead condition-editing code

The frontend condition create/edit path was never wired (no caller, no UI).
Conditions stay live where used: the SurveyFlowService reads tl_survey_condition
for jumps, the editor shows the read-only overview, and delete still works.

Removed:
- SurveyConditionEditorType (zero references)
- SurveyEditorService::saveCondition() + its SurveyConditionData import
- SurveyConditionData form model
- SurveyConditionRepository::update() (only caller was saveCondition)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/Repository/SurveyConditionRepository.php

@@ -72,17 +72,6 @@ final class SurveyConditionRepository
         return $this->findById($id) ?? throw new \RuntimeException('Bedingung konnte nicht angelegt werden.');
     }
 
-    public function update(SurveyConditionModel $condition, array $data): void
-    {
-        $this->connection->update('tl_survey_condition', [
-            'sourceQuestion' => (int) ($data['sourceQuestion'] ?? $condition->sourceQuestion),
-            'answerValue' => mb_strtolower(trim((string) ($data['answerValue'] ?? $condition->answerValue))),
-            'targetQuestion' => (int) ($data['targetQuestion'] ?? $condition->targetQuestion),
-        ], [
-            'id' => (int) $condition->id,
-        ]);
-    }
-
     public function delete(int $surveyId, int $conditionId): void
     {
         $this->connection->delete('tl_survey_condition', [