Remove references to "ios_signing_cert_name", expecting that the Bazel native flag is replaced by or re-routed to the Starlark build config equivalent.

Cherry-pick: f7e5aa8

Author: nglevin

apple/internal/codesigning_support.bzl

@@ -74,24 +74,17 @@ def _codesignopts_from_rule_ctx(ctx):
 def _preferred_codesigning_identity(
         *,
         build_settings,
-        objc_fragment,
         requires_adhoc_signing):
     """Returns the preferred codesigning identity from platform prerequisites.
 
     Args:
       build_settings: The build settings from apple_xplat_toolchain_info or platform_prerequisites.
-      objc_fragment: The objc fragment interface from ctx.fragments.objc.
       requires_adhoc_signing: Whether this signing operation requires adhoc signing with the adhoc
           pseudo identity. i.e. if this is a simulator build.
     """
     if requires_adhoc_signing:
         return _ADHOC_PSEUDO_IDENTITY
     if build_settings:
-        if objc_fragment:
-            # TODO(b/252873771): Remove this fallback when the native Bazel flag
-            # ios_signing_cert_name is removed.
-            return (build_settings.signing_certificate_name or
-                    objc_fragment.signing_certificate_name)
         return build_settings.signing_certificate_name
     return None
 
@@ -141,7 +134,6 @@ def _codesign_args_for_path(
     # use an ad hoc identity.
     identity = _preferred_codesigning_identity(
         build_settings = platform_prerequisites.build_settings,
-        objc_fragment = platform_prerequisites.objc_fragment,
         requires_adhoc_signing = not platform_prerequisites.platform.is_device,
     )
     if not identity:

apple/internal/partials/codesigning_dossier.bzl

@@ -276,7 +276,6 @@ def _codesigning_dossier_partial_impl(
 
     codesign_identity = codesigning_support.preferred_codesigning_identity(
         build_settings = platform_prerequisites.build_settings,
-        objc_fragment = platform_prerequisites.objc_fragment,
         requires_adhoc_signing = not platform_prerequisites.platform.is_device,
     )
 

apple/internal/xcframework_rules.bzl

@@ -1184,15 +1184,13 @@ def _create_xcframework_codesigning_dossier(
         apple_fragment,
         apple_mac_toolchain_info,
         build_settings,
-        objc_fragment,
         rule_label,
         xcode_config):
     """Generates the codesigning dossier for an XCFramework."""
     output_dossier = actions.declare_file("%s_dossier.zip" % rule_label.name)
 
     codesign_identity = codesigning_support.preferred_codesigning_identity(
         build_settings = build_settings,
-        objc_fragment = objc_fragment,
         # Never adhoc sign XCFrameworks; the SDK signing requires a valid code signing identity
         # corresponding to a certificate.
         requires_adhoc_signing = False,
@@ -1399,7 +1397,6 @@ def _apple_xcframework_impl(ctx):
         apple_fragment = apple_fragment,
         apple_mac_toolchain_info = apple_mac_toolchain_info,
         build_settings = build_settings,
-        objc_fragment = objc_fragment,
         rule_label = rule_label,
         xcode_config = xcode_version_config,
     )
@@ -1781,7 +1778,6 @@ def _apple_static_xcframework_impl(ctx):
         apple_fragment = apple_fragment,
         apple_mac_toolchain_info = apple_mac_toolchain_info,
         build_settings = build_settings,
-        objc_fragment = objc_fragment,
         rule_label = rule_label,
         xcode_config = xcode_version_config,
     )