Remove unused --extra_entitlements flag

This was never read

Closes #9427.

PiperOrigin-RevId: 272013891
diff --git a/src/main/java/com/google/devtools/build/lib/rules/objc/ObjcCommandLineOptions.java b/src/main/java/com/google/devtools/build/lib/rules/objc/ObjcCommandLineOptions.java
index f6e15e7..cc46506 100644
--- a/src/main/java/com/google/devtools/build/lib/rules/objc/ObjcCommandLineOptions.java
+++ b/src/main/java/com/google/devtools/build/lib/rules/objc/ObjcCommandLineOptions.java
@@ -202,18 +202,6 @@
   public boolean debugWithGlibcxx;
 
   @Option(
-    name = "extra_entitlements",
-    defaultValue = "null",
-    converter = LabelConverter.class,
-    documentationCategory = OptionDocumentationCategory.SIGNING,
-    effectTags = {OptionEffectTag.CHANGES_INPUTS},
-    help =
-        "Location of a .entitlements file that is merged into any iOS signing action in this "
-            + "build."
-  )
-  public Label extraEntitlements;
-
-  @Option(
     name = "device_debug_entitlements",
     defaultValue = "true",
     documentationCategory = OptionDocumentationCategory.SIGNING,
diff --git a/src/main/java/com/google/devtools/build/lib/rules/objc/ObjcConfiguration.java b/src/main/java/com/google/devtools/build/lib/rules/objc/ObjcConfiguration.java
index 9ba7762..cc866c3 100644
--- a/src/main/java/com/google/devtools/build/lib/rules/objc/ObjcConfiguration.java
+++ b/src/main/java/com/google/devtools/build/lib/rules/objc/ObjcConfiguration.java
@@ -62,7 +62,6 @@
   private final boolean moduleMapsEnabled;
   @Nullable private final String signingCertName;
   private final boolean debugWithGlibcxx;
-  @Nullable private final Label extraEntitlements;
   private final boolean deviceDebugEntitlements;
   private final boolean enableAppleBinaryNativeProtos;
   private final HeaderDiscovery.DotdPruningMode dotdPruningPlan;
@@ -92,7 +91,6 @@
     this.moduleMapsEnabled = objcOptions.enableModuleMaps;
     this.signingCertName = objcOptions.iosSigningCertName;
     this.debugWithGlibcxx = objcOptions.debugWithGlibcxx;
-    this.extraEntitlements = objcOptions.extraEntitlements;
     this.deviceDebugEntitlements = objcOptions.deviceDebugEntitlements;
     this.enableAppleBinaryNativeProtos = objcOptions.enableAppleBinaryNativeProtos;
     this.dotdPruningPlan =
@@ -238,14 +236,6 @@
   }
 
   /**
-   * Returns the extra entitlements plist specified as a flag or {@code null} if none was given.
-   */
-  @Nullable
-  public Label getExtraEntitlements() {
-    return extraEntitlements;
-  }
-
-  /**
    * Returns whether device debug entitlements should be included when signing an application.
    *
    * <p>Note that debug entitlements will be included only if the --device_debug_entitlements flag