Remove label_index feature flag

It turns out this feature flag was never fully rolled out, and is part of ATS (automated test selection) which was also not fully launched.

This will now remove this feature flag, as a precursor to removing labels altogether.

rollouts/__init__.py

@@ -4,12 +4,6 @@
 FLAKY_TEST_DETECTION = Feature("flaky_test_detection")
 FLAKY_SHADOW_MODE = Feature("flaky_shadow_mode")
 
-# Eventually we want all repos to use this
-# This flag will just help us with the rollout process
-USE_LABEL_INDEX_IN_REPORT_PROCESSING_BY_REPO_ID = Feature(
-    "use_label_index_in_report_processing"
-)
-
 PARALLEL_UPLOAD_PROCESSING_BY_REPO = Feature("parallel_upload_processing")
 
 CARRYFORWARD_BASE_SEARCH_RANGE_BY_OWNER = Feature("carryforward_base_search_range")

services/report/languages/pycoverage.py

@@ -28,22 +28,13 @@ def process(
             ] + [(COVERAGE_MISS, ln) for ln in file_coverage["missing_lines"]]
             for cov, ln in lines_and_coverage:
                 if ln > 0:
-                    label_list_of_lists: list[list[str]] | list[list[int]] = []
-                    if report_builder_session.should_use_label_index:
-                        label_list_of_lists = [
-                            [single_id]
-                            for single_id in labels_table._get_list_of_label_ids(
-                                report_builder_session.label_index,
-                                file_coverage.get("contexts", {}).get(str(ln), []),
-                            )
-                        ]
-                    else:
-                        label_list_of_lists = [
-                            [labels_table._normalize_label(testname)]
-                            for testname in file_coverage.get("contexts", {}).get(
-                                str(ln), []
-                            )
-                        ]
+                    # label_list_of_lists: list[list[str]] | list[list[int]] = []
+                    label_list_of_lists = [
+                        [labels_table._normalize_label(testname)]
+                        for testname in file_coverage.get("contexts", {}).get(
+                            str(ln), []
+                        )
+                    ]
                     _file.append(
                         ln,
                         report_builder_session.create_coverage_line(

services/report/languages/tests/unit/__init__.py

@@ -6,7 +6,6 @@ def create_report_builder_session(
     path_fixer: PathFixer | None = None,
     filename: str = "filename",
     current_yaml: dict | None = None,
-    should_use_label_index: bool = False,
 ) -> ReportBuilderSession:
     def fixes(filename, bases_to_try=None):
         return filename
@@ -16,6 +15,5 @@ def fixes(filename, bases_to_try=None):
         ignored_lines={},
         sessionid=0,
         current_yaml=current_yaml,
-        should_use_label_index=should_use_label_index,
     )
     return report_builder.create_report_builder_session(filename)