# Release 2.12.0

### Breaking Changes

*   Build, Compilation and Packaging

- Removed GA'ed feature gate `DelegateFSGroupToCSIDriver`. ([#117655](https://github.com/kubernetes/kubernetes/pull/117655), [@carlory](https://github.com/carlory))
- Removed GA'ed feature gate `DevicePlugins`. ([#117656](https://github.com/kubernetes/kubernetes/pull/117656), [@carlory](https://github.com/carlory))

	}
}

// removeGroupFromMembershipsMap - removes the group from every member
// in the cache. IMPORTANT: Assumes c.Lock() is held by caller.
func (c *iamCache) removeGroupFromMembershipsMap(group string) {
	for member, groups := range c.iamUserGroupMemberships {
		if !groups.Contains(group) {
			continue
		}
		groups.Remove(group)
		c.iamUserGroupMemberships[member] = groups
	}
}

- Feature-gate VolumeSubpath has been deprecated and cannot be disabled. It will be completely removed in 1.25 (#105474, @mauriciopoppe) [SIG Storage]
- Kubeadm: remove the deprecated / NO-OP phase "update-cluster-status" in "kubeadm reset" (#105888, @neolit123) [SIG Cluster Lifecycle]

			// Adding a *TODO* to remove this later when Golang server
			// doesn't filter out the 'Expect' header.
			extractedSignedHeaders.Set(header, "100-continue")
		case "host":
			// Go http server removes "host" from Request.Header
			extractedSignedHeaders.Set(header, r.Host)
		case "transfer-encoding":
			// Go http server removes "host" from Request.Header

*   Kubelet no longer removes unregistered extended resource capacities from node status; cluster admins will have to manually remove extended resources exposed via device plugins when they the remove plugins themselves. ([#53353](https://github.com/kubernetes/kubernetes/pull/53353),[ @jiayingz](https://github.com/jiayingz))

    assertTrue(cycle.hasNext());
    assertThrows(IllegalStateException.class, () -> cycle.remove());
  }

  public void testCycleRemoveSameElementTwice() {
    Iterator<String> cycle = Iterators.cycle("a", "b");
    cycle.next();
    cycle.remove();
    assertThrows(IllegalStateException.class, () -> cycle.remove());
  }

  public void testCycleWhenRemoveIsNotSupported() {

    assertTrue(cycle.hasNext());
    assertThrows(IllegalStateException.class, () -> cycle.remove());
  }

  public void testCycleRemoveSameElementTwice() {
    Iterator<String> cycle = Iterators.cycle("a", "b");
    cycle.next();
    cycle.remove();
    assertThrows(IllegalStateException.class, () -> cycle.remove());
  }

  public void testCycleWhenRemoveIsNotSupported() {

   *     #forcePut} instead.
   */
  @CanIgnoreReturnValue
  @Override
  @CheckForNull
  V put(@ParametricNullness K key, @ParametricNullness V value);

  /**
   * An alternate form of {@code put} that silently removes any existing entry with the value {@code
   * value} before proceeding with the {@link #put} operation. If the bimap previously contained the
   * provided key-value mapping, this method has no effect.
   *

- Removed the GA feature gate `RemoveSelfLink`.
   ([#122468](https://github.com/kubernetes/kubernetes/pull/122468), [@carlory](https://github.com/carlory))
- Removed the generally available feature gate `ExpandedDNSConfig`.
   ([#122086](https://github.com/kubernetes/kubernetes/pull/122086), [@bzsuni](https://github.com/bzsuni))