Remove unused method getValidatorsAtHead from QbftValidatorProvider (#8422)

Signed-off-by: Jason Frame <jason.frame@consensys.net>

consensus/qbft-core/src/main/java/org/hyperledger/besu/consensus/qbft/core/types/QbftValidatorProvider.java

@@ -21,13 +21,6 @@ import java.util.Collection;
 /** The interface Validator provider. */
 public interface QbftValidatorProvider {
 
-  /**
-   * Gets validators at head.
-   *
-   * @return the validators at head
-   */
-  Collection<Address> getValidatorsAtHead();
-
   /**
    * Gets validators after block.
    *

consensus/qbft/src/main/java/org/hyperledger/besu/consensus/qbft/adaptor/QbftValidatorProviderAdaptor.java

@@ -38,11 +38,6 @@ public class QbftValidatorProviderAdaptor implements QbftValidatorProvider {
     this.validatorProvider = validatorProvider;
   }
 
-  @Override
-  public Collection<Address> getValidatorsAtHead() {
-    return validatorProvider.getValidatorsAtHead();
-  }
-
   @Override
   public Collection<Address> getValidatorsAfterBlock(final QbftBlockHeader header) {
     return validatorProvider.getValidatorsAfterBlock(BlockUtil.toBesuBlockHeader(header));

consensus/qbft/src/test/java/org/hyperledger/besu/consensus/qbft/adaptor/QbftValidatorProviderAdaptorTest.java

@@ -34,17 +34,6 @@ import org.mockito.junit.jupiter.MockitoExtension;
 class QbftValidatorProviderAdaptorTest {
   @Mock private ValidatorProvider validatorProvider;
 
-  @Test
-  void returnsValidatorsAtHead() {
-    List<Address> validatorsAtHead =
-        List.of(Address.fromHexString("0x095e7baea6a6c7c4c2dfeb977efac326af552d87"));
-    when(validatorProvider.getValidatorsAtHead()).thenReturn(validatorsAtHead);
-
-    QbftValidatorProviderAdaptor qbftValidatorProviderAdaptor =
-        new QbftValidatorProviderAdaptor(validatorProvider);
-    assertThat(qbftValidatorProviderAdaptor.getValidatorsAtHead()).isEqualTo(validatorsAtHead);
-  }
-
   @Test
   void returnsValidatorsAfterBlock() {
     BlockHeader header = new BlockHeaderTestFixture().buildHeader();