Revert "TASK: Reintroduce content graph / cr read model cache"

In commit d57195d the cache invalidation was partly repaired
But as we removed the content graph cache layer currently in 9.0 neos/neos-development-collection#5246

A reintroduction will be discussed as part of another change.

Related neos/neos-development-collection#5039

src/DoctrineDbalContentGraphProjection.php

@@ -67,7 +67,6 @@
 use Neos\ContentRepository\Core\Projection\ContentGraph\Timestamps;
 use Neos\ContentRepository\Core\Projection\ProjectionInterface;
 use Neos\ContentRepository\Core\Projection\ProjectionStatus;
-use Neos\ContentRepository\Core\Projection\WithMarkStaleInterface;
 use Neos\ContentRepository\Core\SharedModel\Node\NodeAggregateClassification;
 use Neos\ContentRepository\Core\SharedModel\Node\NodeAggregateId;
 use Neos\ContentRepository\Core\SharedModel\Node\NodeName;
@@ -80,7 +79,7 @@
  * @implements ProjectionInterface<ContentRepositoryReadModel>
  * @internal but the graph projection is api
  */
-final class DoctrineDbalContentGraphProjection implements ProjectionInterface, WithMarkStaleInterface
+final class DoctrineDbalContentGraphProjection implements ProjectionInterface
 {
     use ContentStream;
     use NodeMove;
@@ -170,12 +169,6 @@ public function reset(): void
 
         $this->checkpointStorage->acquireLock();
         $this->checkpointStorage->updateAndReleaseLock(SequenceNumber::none());
-        $this->getState()->forgetInstances();
-    }
-
-    public function markStale(): void
-    {
-        $this->getState()->forgetInstances();
     }
 
     public function getCheckpointStorage(): DbalCheckpointStorage