Remove unused code for AuthHeadersProvider.

This was added in 2019 and was [abandoned](#4889 (comment)).

PiperOrigin-RevId: 719331882
Change-Id: I29fe2d41146ca72adc7844c19dc3bde6e2353997

src/main/java/com/google/devtools/build/lib/runtime/BlazeRuntime.java

@@ -195,7 +195,6 @@ public final class BlazeRuntime implements BugReport.BlazeRuntimeInterface {
   private final String productName;
   private final BuildEventArtifactUploaderFactoryMap buildEventArtifactUploaderFactoryMap;
   private final ActionKeyContext actionKeyContext;
-  private final ImmutableMap<String, AuthHeadersProvider> authHeadersProviderMap;
   @Nullable private final RepositoryRemoteExecutorFactory repositoryRemoteExecutorFactory;
 
   // Workspace state (currently exactly one workspace per server)
@@ -228,7 +227,6 @@ private BlazeRuntime(
       Iterable<BlazeCommand> commands,
       String productName,
       BuildEventArtifactUploaderFactoryMap buildEventArtifactUploaderFactoryMap,
-      ImmutableMap<String, AuthHeadersProvider> authHeadersProviderMap,
       RepositoryRemoteExecutorFactory repositoryRemoteExecutorFactory,
       InstrumentationOutputFactory instrumentationOutputFactory,
       FileSystemLock installBaseLock) {
@@ -258,8 +256,6 @@ private BlazeRuntime(
         new CommandNameCacheImpl(commandMap));
     this.productName = productName;
     this.buildEventArtifactUploaderFactoryMap = buildEventArtifactUploaderFactoryMap;
-    this.authHeadersProviderMap =
-        Preconditions.checkNotNull(authHeadersProviderMap, "authHeadersProviderMap");
     this.repositoryRemoteExecutorFactory = repositoryRemoteExecutorFactory;
     this.instrumentationOutputFactory = instrumentationOutputFactory;
     this.installBaseLock = installBaseLock;
@@ -1565,11 +1561,6 @@ public BuildEventArtifactUploaderFactoryMap getBuildEventArtifactUploaderFactory
     return buildEventArtifactUploaderFactoryMap;
   }
 
-  /** Returns a map of all registered {@link AuthHeadersProvider}s. */
-  public ImmutableMap<String, AuthHeadersProvider> getAuthHeadersProvidersMap() {
-    return authHeadersProviderMap;
-  }
-
   public RepositoryRemoteExecutorFactory getRepositoryRemoteExecutorFactory() {
     return repositoryRemoteExecutorFactory;
   }
@@ -1711,7 +1702,6 @@ public BlazeRuntime build() throws AbruptExitException {
               serverBuilder.getCommands(),
               productName,
               serverBuilder.getBuildEventArtifactUploaderMap(),
-              serverBuilder.getAuthHeadersProvidersMap(),
               serverBuilder.getRepositoryRemoteExecutorFactory(),
               serverBuilder.createInstrumentationOutputFactory(),
               installBaseLock);

src/main/java/com/google/devtools/build/lib/runtime/ServerBuilder.java

@@ -37,8 +37,6 @@ public final class ServerBuilder {
       ImmutableList.builder();
   private final BuildEventArtifactUploaderFactoryMap.Builder buildEventArtifactUploaderFactories =
       new BuildEventArtifactUploaderFactoryMap.Builder();
-  private final ImmutableMap.Builder<String, AuthHeadersProvider> authHeadersProvidersMap =
-      ImmutableMap.builder();
   private RepositoryRemoteExecutorFactory repositoryRemoteExecutorFactory;
   private final InstrumentationOutputFactory.Builder instrumentationOutputFactoryBuilder =
       new InstrumentationOutputFactory.Builder();
@@ -172,22 +170,6 @@ public ServerBuilder setRepositoryRemoteExecutorFactory(
     return this;
   }
 
-  /**
-   * Register a provider of authentication headers that blaze modules can use. See {@link
-   * AuthHeadersProvider} for more details.
-   */
-  @CanIgnoreReturnValue
-  public ServerBuilder addAuthHeadersProvider(
-      String name, AuthHeadersProvider authHeadersProvider) {
-    authHeadersProvidersMap.put(name, authHeadersProvider);
-    return this;
-  }
-
-  /** Returns a map of all registered {@link AuthHeadersProvider}s. */
-  public ImmutableMap<String, AuthHeadersProvider> getAuthHeadersProvidersMap() {
-    return authHeadersProvidersMap.buildOrThrow();
-  }
-
   /**
    * Returns the builder for {@link InstrumentationOutputFactory} so that suppliers for different
    * types of {@link InstrumentationOutputBuilder} can be added.