Remove PYTHON_VERSION_COMPATIBILITY from cipd example

This test's expectation files include exception strings, which differ
between py2 and py3. This didn't actually break the tests in the past
because one of the cipd module's transitive dependencies,
`recipe_engine/proto`, was not py3-compatible, so the test results were
ignored.

However, I'm working on making `recipe_engine/proto` py3-compatible, and
now that it is compatible, these test failures are considered fatal. See
https://logs.chromium.org/logs/infra/buildbucket/cr-buildbucket/8837185422185352433/+/u/train_recipes_at_upstream_CL/stdout

I imagine the exception-formatting issue will eventually by fixed in the
recipe engine, but until that happens these tests can't be considered
py3-compatible.

Bug: 1227140
Change-Id: I75b2b9c0090f418cb412d497e914a30155c2b12b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/3140151
Auto-Submit: Oliver Newman <olivernewman@google.com>
Reviewed-by: Gavin Mak <gavinmak@google.com>
Commit-Queue: Oliver Newman <olivernewman@google.com>

recipes/README.recipes.md

@@ -21,7 +21,7 @@
   * [bot_update:examples/full](#recipes-bot_update_examples_full) (Python3 ✅)
   * [bot_update:tests/do_not_retry_patch_failures_in_cq](#recipes-bot_update_tests_do_not_retry_patch_failures_in_cq) (Python3 ✅)
   * [bot_update:tests/ensure_checkout](#recipes-bot_update_tests_ensure_checkout) (Python3 ✅)
-  * [cipd:examples/full](#recipes-cipd_examples_full) (Python3 ✅)
+  * [cipd:examples/full](#recipes-cipd_examples_full)
   * [cipd:examples/platform_suffix](#recipes-cipd_examples_platform_suffix) (Python3 ✅)
   * [depot_tools:examples/full](#recipes-depot_tools_examples_full) (Python3 ✅)
   * [fetch_end_to_end_test](#recipes-fetch_end_to_end_test)
@@ -1078,11 +1078,11 @@ PYTHON_VERSION_COMPATIBILITY: PY2+3
 — **def [RunSteps](/recipes/recipe_modules/bot_update/tests/ensure_checkout.py#16)(api):**
 ### *recipes* / [cipd:examples/full](/recipes/recipe_modules/cipd/examples/full.py)
 
-[DEPS](/recipes/recipe_modules/cipd/examples/full.py#10): [cipd](#recipe_modules-cipd), [recipe\_engine/path][recipe_engine/recipe_modules/path], [recipe\_engine/platform][recipe_engine/recipe_modules/platform], [recipe\_engine/properties][recipe_engine/recipe_modules/properties], [recipe\_engine/step][recipe_engine/recipe_modules/step]
+[DEPS](/recipes/recipe_modules/cipd/examples/full.py#8): [cipd](#recipe_modules-cipd), [recipe\_engine/path][recipe_engine/recipe_modules/path], [recipe\_engine/platform][recipe_engine/recipe_modules/platform], [recipe\_engine/properties][recipe_engine/recipe_modules/properties], [recipe\_engine/step][recipe_engine/recipe_modules/step]
 
-PYTHON_VERSION_COMPATIBILITY: PY2+3
+PYTHON_VERSION_COMPATIBILITY: PY2
 
-— **def [RunSteps](/recipes/recipe_modules/cipd/examples/full.py#29)(api, use_pkg, pkg_files, pkg_dirs, ver_files, install_mode):**
+— **def [RunSteps](/recipes/recipe_modules/cipd/examples/full.py#27)(api, use_pkg, pkg_files, pkg_dirs, ver_files, install_mode):**
 ### *recipes* / [cipd:examples/platform\_suffix](/recipes/recipe_modules/cipd/examples/platform_suffix.py)
 
 [DEPS](/recipes/recipe_modules/cipd/examples/platform_suffix.py#10): [cipd](#recipe_modules-cipd), [recipe\_engine/path][recipe_engine/recipe_modules/path], [recipe\_engine/platform][recipe_engine/recipe_modules/platform], [recipe\_engine/properties][recipe_engine/recipe_modules/properties], [recipe\_engine/step][recipe_engine/recipe_modules/step]

recipes/recipe_modules/cipd/examples/full.expected/pkg_bad_file.json

@@ -289,7 +289,7 @@
       "The recipe has crashed at point 'Uncaught exception'!",
       "",
       "Traceback (most recent call last):",
-      "  File \"RECIPE_REPO[depot_tools]/recipes/recipe_modules/cipd/examples/full.py\", line 72, in RunSteps",
+      "  File \"RECIPE_REPO[depot_tools]/recipes/recipe_modules/cipd/examples/full.py\", line 70, in RunSteps",
       "    pkg.add_file(api.path.abs_to_path(fullpath))",
       "  File \"RECIPE_REPO[depot_tools]/recipes/recipe_modules/cipd/api.py\", line 118, in add_file",
       "    self.files.append(self._rel_path(file_path))",

recipes/recipe_modules/cipd/examples/full.expected/pkg_bad_mode.json

@@ -289,7 +289,7 @@
       "The recipe has crashed at point 'Uncaught exception'!",
       "",
       "Traceback (most recent call last):",
-      "  File \"RECIPE_REPO[depot_tools]/recipes/recipe_modules/cipd/examples/full.py\", line 70, in RunSteps",
+      "  File \"RECIPE_REPO[depot_tools]/recipes/recipe_modules/cipd/examples/full.py\", line 68, in RunSteps",
       "    pkg = api.cipd.PackageDefinition('infra/fake-package', root, install_mode)",
       "  File \"RECIPE_REPO[depot_tools]/recipes/recipe_modules/cipd/api.py\", line 64, in __init__",
       "    raise ValueError('invalid value for install_mode: %r' % install_mode)",

recipes/recipe_modules/cipd/examples/full.expected/pkg_bad_verfile.json

@@ -289,7 +289,7 @@
       "The recipe has crashed at point 'Uncaught exception'!",
       "",
       "Traceback (most recent call last):",
-      "  File \"RECIPE_REPO[depot_tools]/recipes/recipe_modules/cipd/examples/full.py\", line 78, in RunSteps",
+      "  File \"RECIPE_REPO[depot_tools]/recipes/recipe_modules/cipd/examples/full.py\", line 76, in RunSteps",
       "    pkg.add_version_file(pth)",
       "  File \"RECIPE_REPO[depot_tools]/recipes/recipe_modules/cipd/api.py\", line 144, in add_version_file",
       "    raise ValueError('add_version_file() may only be used once.')",

recipes/recipe_modules/cipd/examples/full.py

@@ -5,8 +5,6 @@
 from recipe_engine.config import List, Single, ConfigList, ConfigGroup
 from recipe_engine.recipe_api import Property
 
-PYTHON_VERSION_COMPATIBILITY = 'PY2+3'
-
 DEPS = [
   'recipe_engine/path',
   'recipe_engine/platform',