Bug 1707953: Remove macOS SDK maximum version check r=firefox-build-system-reviewers,glandium

The maximum version check has caused more unnecessary failed
builds (for freshly up-to-date devs) than helpful guards against
tough-to-diagnose issues.

Differential Revision: https://phabricator.services.mozilla.com/D113675

build/moz.configure/toolchain.configure

@@ -93,7 +93,6 @@ with only_when(host_is_osx | target_is_osx):
         # installation docs:
         # https://firefox-source-docs.mozilla.org/setup/macos_build.html#macos-sdk-is-unsupported
         sdk_min_version = Version("10.12")
-        sdk_max_version = Version("11.1")
 
         if sdk:
             sdk = sdk[0]
@@ -137,12 +136,6 @@ with only_when(host_is_osx | target_is_osx):
                 "SDK installation docs: %s"
                 % (version, sdk_min_version, sdk_installation_docs_url)
             )
-        if version > sdk_max_version:
-            die(
-                'SDK version "%s" is unsupported. Please downgrade to version '
-                "%s. See the manual SDK installation docs: %s"
-                % (version, sdk_max_version, sdk_installation_docs_url)
-            )
         return sdk
 
     set_config("MACOS_SDK_DIR", macos_sdk)