Remove role mapping block check (#114223)

This method is used in multiple contexts that may not all handle
cluster-block exceptions gracefully, esp. since some types of cluster
blocks are retryable. Removing this, and may follow up with handling the
cluster state block for the affected transport actions instead.

x-pack/plugin/core/src/main/java/org/elasticsearch/xpack/core/security/authz/RoleMappingMetadata.java

@@ -12,7 +12,6 @@
 import org.elasticsearch.cluster.AbstractNamedDiffable;
 import org.elasticsearch.cluster.ClusterState;
 import org.elasticsearch.cluster.NamedDiff;
-import org.elasticsearch.cluster.block.ClusterBlockLevel;
 import org.elasticsearch.cluster.metadata.Metadata;
 import org.elasticsearch.common.collect.Iterators;
 import org.elasticsearch.common.io.stream.StreamInput;
@@ -58,7 +57,6 @@ public final class RoleMappingMetadata extends AbstractNamedDiffable<Metadata.Cu
     private static final RoleMappingMetadata EMPTY = new RoleMappingMetadata(Set.of());
 
     public static RoleMappingMetadata getFromClusterState(ClusterState clusterState) {
-        clusterState.blocks().globalBlockedRaiseException(ClusterBlockLevel.READ);
         return clusterState.metadata().custom(RoleMappingMetadata.TYPE, RoleMappingMetadata.EMPTY);
     }