Remove NodeFinder from MutatingScope->restoreThis()

Author: staabm

src/Analyser/MutatingScope.php

@@ -3525,22 +3525,16 @@ public function restoreThis(self $restoreThisScope): self
 		$nativeExpressionTypes = $this->nativeExpressionTypes;
 
 		if ($restoreThisScope->isInClass()) {
-			$nodeFinder = new NodeFinder();
-			$cb = static fn ($expr) => $expr instanceof Variable && $expr->name === 'this';
 			foreach ($restoreThisScope->expressionTypes as $exprString => $expressionTypeHolder) {
-				$expr = $expressionTypeHolder->getExpr();
-				$thisExpr = $nodeFinder->findFirst([$expr], $cb);
-				if ($thisExpr === null) {
+				if (!str_starts_with($exprString, '$this')) {
 					continue;
 				}
 
 				$expressionTypes[$exprString] = $expressionTypeHolder;
 			}
 
 			foreach ($restoreThisScope->nativeExpressionTypes as $exprString => $expressionTypeHolder) {
-				$expr = $expressionTypeHolder->getExpr();
-				$thisExpr = $nodeFinder->findFirst([$expr], $cb);
-				if ($thisExpr === null) {
+				if (!str_starts_with($exprString, '$this')) {
 					continue;
 				}