Remove Project.index. (#593)

* Make Project._index method private, refactor to remove unused arguments.

* Remove xfailed crawler test (functionality no longer needed).

* Delete indexing module.

* Clean up references to index in docs.

changelog.txt

@@ -16,7 +16,7 @@ Removed
  - The pre-SyncedCollection synchronized dictionary classes, including SyncedDict, SyncedAttrDict, and JSONDict (#577).
  - The old custom JSON encoder and dumps wrapper (#577).
  - The MPIPool and the filesystems.py module (#575).
- - The following Project methods: ``get_id``, ``build_job_search_index``, ``build_job_statepoint_index``, ``find_job_ids``, ``reset_statepoint``, ``update_statepoint``, ``create_access_module`` (#574).
+ - The following Project methods: ``get_id``, ``build_job_search_index``, ``build_job_statepoint_index``, ``find_job_ids``, ``reset_statepoint``, ``update_statepoint``, ``create_access_module``, ``index`` (#574, #593).
  - The following Job methods: ``get_id`` (#578).
  - The ``syncutil.copytree`` method (#581).
  - All Crawlers, including ``RegexFileCrawler``, ``MainCrawler``, ``MasterCrawler``, ``SignacProjectCrawler``, and ``BaseCrawler``, in addition to all associated functionality in indexing.py (#580).

doc/api.rst

@@ -34,7 +34,6 @@ The Project
     Project.groupbydoc
     Project.import_from
     Project.id
-    Project.index
     Project.isfile
     Project.min_len_unique_id
     Project.num_jobs

signac/__main__.py

@@ -180,7 +180,7 @@ def main_project(args):
     )
     project = get_project()
     if args.index:
-        for doc in project.index():
+        for doc in project._index():
             print(json.dumps(doc))
         return
     if args.workspace: