*: stop importing memoize from fuchsia utils

It's been deleted in fxrev.dev/704125 since `functools.lru_cache` can be
used in its place in Python 3.

Bug: b/240137096
Change-Id: Ia7e7b0818c34f6615e8dfbdef69fd4317936f769
Reviewed-on: https://pigweed-review.googlesource.com/c/infra/recipes/+/103560
Reviewed-by: Rob Mohr <mohrr@google.com>
Pigweed-Auto-Submit: Oliver Newman <olivernewman@google.com>
Commit-Queue: Auto-Submit <auto-submit@pigweed.google.com.iam.gserviceaccount.com>
diff --git a/recipe_modules/checkout/api.py b/recipe_modules/checkout/api.py
index 1fc4afe..aeea61e 100644
--- a/recipe_modules/checkout/api.py
+++ b/recipe_modules/checkout/api.py
@@ -24,7 +24,6 @@
 import attr
 from PB.recipe_modules.pigweed.checkout.options import Options
 from recipe_engine import config_types, recipe_api
-from RECIPE_MODULES.fuchsia.utils import memoize
 
 PIGWEED_REMOTE = 'https://pigweed.googlesource.com/pigweed/pigweed'
 
diff --git a/recipe_modules/pw_presubmit/api.py b/recipe_modules/pw_presubmit/api.py
index ef125a5..e167b34 100644
--- a/recipe_modules/pw_presubmit/api.py
+++ b/recipe_modules/pw_presubmit/api.py
@@ -16,8 +16,7 @@
 import collections
 
 import attr
-from recipe_engine import config_types, recipe_api
-from RECIPE_MODULES.fuchsia.utils import memoize
+from recipe_engine import recipe_api
 
 
 @attr.s