Re-apply get_class() simplification in ObjectType::equals()

The previous revert (9f0da34) was based on a faulty premise that
TemplateObjectType has no equals() override. In fact, TemplateObjectType
gets its equals() from TemplateTypeTrait, so get_class($type) !== static::class
is correct and equivalent to the explicit instanceof checks.

All tests (11726) and make phpstan pass with this simpler approach.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: phpstan-bot

phpstan-baseline.neon

@@ -1473,22 +1473,16 @@ parameters:
 			count: 1
 			path: src/Type/ObjectShapeType.php
 
-		-
-			rawMessage: 'Doing instanceof PHPStan\Type\Enum\EnumCaseObjectType is error-prone and deprecated. Use Type::getEnumCases() instead.'
-			identifier: phpstanApi.instanceofType
-			count: 1
-			path: src/Type/ObjectType.php
-
 		-
 			rawMessage: Doing instanceof PHPStan\Type\Generic\GenericObjectType is error-prone and deprecated.
 			identifier: phpstanApi.instanceofType
-			count: 3
+			count: 1
 			path: src/Type/ObjectType.php
 
 		-
 			rawMessage: 'Doing instanceof PHPStan\Type\ObjectType is error-prone and deprecated. Use Type::isObject() or Type::getObjectClassNames() instead.'
 			identifier: phpstanApi.instanceofType
-			count: 3
+			count: 2
 			path: src/Type/ObjectType.php
 
 		-

src/Type/ObjectType.php

@@ -56,6 +56,7 @@
 use function array_map;
 use function array_values;
 use function count;
+use function get_class;
 use function implode;
 use function in_array;
 use function sprintf;
@@ -624,15 +625,7 @@ public function isSuperTypeOf(Type $type): IsSuperTypeOfResult
 
 	public function equals(Type $type): bool
 	{
-		if (!$type instanceof self) {
-			return false;
-		}
-
-		if ($type instanceof EnumCaseObjectType) {
-			return false;
-		}
-
-		if ($type instanceof Generic\GenericObjectType && !$this instanceof Generic\GenericObjectType) {
+		if (get_class($type) !== static::class) {
 			return false;
 		}