Remove sdk_version_for_platform from ctx.fragments.apple .

Progress towards #3424.

RELNOTES[INC]: ctx.fragments.apple.sdk_version_for_platform is not supported anymore. The same information is accessible through the target @bazel_tools//tools/osx:current_xcode_config: point an implicit attribute to it (i.e. attr.label(default=Label("@bazel_tools//tools/osx:current_xcode_config")) then use ctx.attr._xcode_config[apple_common].XcodeVersionConfig].sdk_version_for_platform .

PiperOrigin-RevId: 171652446
diff --git a/src/main/java/com/google/devtools/build/lib/rules/apple/AppleConfiguration.java b/src/main/java/com/google/devtools/build/lib/rules/apple/AppleConfiguration.java
index 24a31d6..fd39b65 100644
--- a/src/main/java/com/google/devtools/build/lib/rules/apple/AppleConfiguration.java
+++ b/src/main/java/com/google/devtools/build/lib/rules/apple/AppleConfiguration.java
@@ -204,29 +204,14 @@
 
 
   /**
-   * Returns the SDK version for ios SDKs (whether they be for simulator or device). This is
-   * directly derived from --ios_sdk_version.
-   *
-   * @deprecated use {@link XcodeConfig#getSdkVersionForPlatform(RuleContext, ApplePlatform)}
-   */
-  // Bug tracking the removal of this method: https://github.com/bazelbuild/bazel/issues/3424
-  @Deprecated public DottedVersion getIosSdkVersion() {
-    return getSdkVersionForPlatform(ApplePlatform.IOS_DEVICE);
-  }
-
-  /**
    * Returns the SDK version for a platform (whether they be for simulator or device). This is
    * directly derived from command line args.
    *
    * @deprecated use {@link XcodeConfig#getSdkVersionForPlatform(RuleContext, ApplePlatform)}
    */
-  @SkylarkCallable(
-      name = "sdk_version_for_platform",
-      doc = "The version of the platform SDK that will be used to build targets for the given "
-          + "platform.")
   @Deprecated
   // Bug tracking the removal of this method: https://github.com/bazelbuild/bazel/issues/3424
-  public DottedVersion getSdkVersionForPlatform(ApplePlatform platform) {
+  private DottedVersion getSdkVersionForPlatform(ApplePlatform platform) {
     switch (platform) {
       case IOS_DEVICE:
       case IOS_SIMULATOR:
diff --git a/src/main/java/com/google/devtools/build/lib/rules/apple/XcodeConfig.java b/src/main/java/com/google/devtools/build/lib/rules/apple/XcodeConfig.java
index 0323a05..9749a9e 100644
--- a/src/main/java/com/google/devtools/build/lib/rules/apple/XcodeConfig.java
+++ b/src/main/java/com/google/devtools/build/lib/rules/apple/XcodeConfig.java
@@ -353,13 +353,7 @@
         XcodeConfigRule.XCODE_CONFIG_ATTR_NAME,
         RuleConfiguredTarget.Mode.TARGET,
         XcodeConfigProvider.PROVIDER);
-    DottedVersion fromProvider = versions.getSdkVersionForPlatform(platform);
-    DottedVersion fromConfig = ruleContext.getFragment(AppleConfiguration.class)
-        .getSdkVersionForPlatform(platform);
-    // This sanity check is there to keep this provider in sync with AppleConfiguration until the
-    // latter can be removed. Tracking bug: https://github.com/bazelbuild/bazel/issues/3424
-    Preconditions.checkState(fromProvider.equals(fromConfig));
-    return fromProvider;
+    return versions.getSdkVersionForPlatform(platform);
   }
 
   /**
diff --git a/src/test/java/com/google/devtools/build/lib/rules/objc/ObjcSkylarkTest.java b/src/test/java/com/google/devtools/build/lib/rules/objc/ObjcSkylarkTest.java
index 10d60a9..9a2fdf2 100644
--- a/src/test/java/com/google/devtools/build/lib/rules/objc/ObjcSkylarkTest.java
+++ b/src/test/java/com/google/devtools/build/lib/rules/objc/ObjcSkylarkTest.java
@@ -262,9 +262,10 @@
         "   xcode_config = ctx.attr._xcode_config[apple_common.XcodeVersionConfig]",
         "   cpu = ctx.fragments.apple.ios_cpu()",
         "   platform = ctx.fragments.apple.ios_cpu_platform()",
+        "   xcode_config = ctx.attr._xcode_config[apple_common.XcodeVersionConfig]",
         "   env = ctx.fragments.apple.target_apple_env(platform)",
         "   xcode_version = xcode_config.xcode_version()",
-        "   sdk_version = ctx.fragments.apple.sdk_version_for_platform(platform)",
+        "   sdk_version = xcode_config.sdk_version_for_platform(platform)",
         "   single_arch_platform = ctx.fragments.apple.single_arch_platform",
         "   single_arch_cpu = ctx.fragments.apple.single_arch_cpu",
         "   platform_type = single_arch_platform.platform_type",