Don't apply a host-configuration transition to the module_map attribute.

This file is a data file that corresponds to header files compiled for the target, and so it should be evaluated in the target configuration.

PiperOrigin-RevId: 327412515

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

@@ -273,7 +273,7 @@ input discovery is supported (currently Google-only).
         /* <!-- #BLAZE_RULE(cc_toolchain).ATTRIBUTE(module_map) -->
         Module map artifact to be used for modular builds.
         <!-- #END_BLAZE_RULE.ATTRIBUTE -->*/
-        .add(attr("module_map", LABEL).legacyAllowAnyFileType().cfg(HostTransition.createFactory()))
+        .add(attr("module_map", LABEL).legacyAllowAnyFileType())
         /* <!-- #BLAZE_RULE(cc_toolchain).ATTRIBUTE(supports_param_files) -->
         Set to True when cc_toolchain supports using param files for linking actions.
         <!-- #END_BLAZE_RULE.ATTRIBUTE -->*/