Remove ccHostToolchainAttribute from CppRuleClases.

The method is never called.

The removal will let us clean up LabelLateBoundDefault.fromHostConfiguration in an effort to remove host configurations altogether.

PiperOrigin-RevId: 417609541

src/main/java/com/google/devtools/build/lib/rules/cpp/CppRuleClasses.java

diff --git a/src/main/java/com/google/devtools/build/lib/rules/cpp/CppRuleClasses.java b/src/main/java/com/google/devtools/build/lib/rules/cpp/CppRuleClasses.java
index b1837c0..b167176 100644
--- a/src/main/java/com/google/devtools/build/lib/rules/cpp/CppRuleClasses.java
+++ b/src/main/java/com/google/devtools/build/lib/rules/cpp/CppRuleClasses.java
@@ -72,14 +72,6 @@
   static final Resolver<CppConfiguration, Label> CC_TOOLCHAIN_CONFIGURATION_RESOLVER =
       (rule, attributes, configuration) -> configuration.getRuleProvidingCcToolchainProvider();
 
-  public static LabelLateBoundDefault<CppConfiguration> ccHostToolchainAttribute(
-      RuleDefinitionEnvironment env) {
-    return LabelLateBoundDefault.fromHostConfiguration(
-        CppConfiguration.class,
-        env.getToolsLabel(CROSSTOOL_LABEL),
-        (rules, attributes, cppConfig) -> cppConfig.getRuleProvidingCcToolchainProvider());
-  }
-
   public static Label ccToolchainTypeAttribute(RuleDefinitionEnvironment env) {
     return env.getToolsLabel(CppHelper.TOOLCHAIN_TYPE_LABEL);
   }