[REM] codeowner: remove github codeowner

Github codeowner is replaced with a runbot version of codeowners for
multiple reason:

- github codeowners is difficult to maintain, the precedence rule will
sometimes remove teams from some file because of a more specific rule
added by another team.

- github codeowner does not support version specific rules, especially
the "all except master" rule. For this use case teams needs to adapt
the new codeowner when freezing a new version.

- github will trigger codeowner on failed rebase, and add almost all
teams as reviewer. Runbot has specific commit and file limit to avoid
this problem.

- runbot codeowner is centralised and does not need to be managed cross
repo/version

- runbot codeowner works for enterprise

Any mofification on codeowner should be requested to runbot team.

closes odoo/odoo#74094

Signed-off-by: Xavier Dollé (xdo) <xdo@odoo.com>

.github/CODEOWNERS

-# Doc: https://help.github.com/en/github/creating-cloning-and-archiving-repositories/about-code-owners
-# Order is important; the last matching pattern takes the most precedence.
-
-# Please apply the following guidelines when updating this file.
-
-# Paths and patterns
-# ==================
-
-# Paths should be ordered alphabetically (when precedence is not an issue).
-# Avoid complex patterns, prefer full path targeting files or directories.
-
-# When creating a more specific pattern of an existing more generic pattern:
-# - The specific pattern must be listed below.
-# - Teams and users of the generic pattern have to be copied to the specific
-#   pattern, unless they approve to lose their ownership for the paths matched
-#   by the specific pattern.
-
-# Teams and users
-# ===============
-
-# Prefer using teams whenever possible, as members of teams and review
-# assignation rules can be dynamically managed outside of this file without
-# requiring a new commit.
-# Only define users for specific cases.
-# For each pattern: list teams first, then users, both alphabetically.
-
-# Listed teams and users must have write permissions on the repository for the
-# feature to work.
-
-
-# Generic fallback rules
-
-/addons/account*/ @odoo/rd-accounting
-/addons/crm*/ @odoo/rd-sm
-/addons/event*/ @odoo/rd-sm
-/addons/l10n_*/ @odoo/rd-accounting
-/addons/*/data/mail_template_data.xml @odoo/rd-sm
-/addons/*/models/ir_http.py @odoo/rd-website
-/addons/*/models/ir_qweb.py @odoo/rd-website
-/addons/*/models/ir_qweb_fields.py @odoo/rd-website
-/addons/website*/ @odoo/rd-website
-/addons/website_event*/ @odoo/rd-notif-muted @odoo/rd-sm
-/addons/website_slides*/ @odoo/rd-notif-muted @odoo/rd-sm
-
-
-# Specific rules
-
-/.github/CODEOWNERS @odoo/rd-code-owners
-
-/addons/bus/ @odoo/rd-framework-js
-
-/addons/http_routing/ @odoo/rd-website
-
-/addons/im_livechat/ @odoo/rd-discuss
-
-/addons/mail/ @odoo/rd-discuss
-/addons/mail/**/*.py @odoo/rd-discuss @odoo/rd-sm
-/addons/mail/models/ir_http.py @odoo/rd-discuss @odoo/rd-website
-
-/addons/mail_bot/ @odoo/rd-discuss
-/addons/mail_bot/models/ir_http.py @odoo/rd-discuss @odoo/rd-website
-
-/addons/mass_mailing/**/*.py @odoo/rd-sm
-
-/addons/mrp/ @odoo/rd-logistics
-/addons/mrp_account/ @odoo/rd-logistics
-
-/addons/phone_validation/ @odoo/rd-sm
-
-/addons/portal/models/ir_http.py @odoo/rd-website
-
-/addons/product_expiry/ @odoo/rd-logistics
-
-/addons/purchase/ @odoo/rd-logistics
-/addons/purchase_mrp/ @odoo/rd-logistics
-/addons/purchase_requisition/ @odoo/rd-logistics
-/addons/purchase_stock/ @odoo/rd-logistics
-
-/addons/rating/**/*.py @odoo/rd-sm
-
-/addons/repair/ @odoo/rd-logistics
-
-/addons/sale_mrp/ @odoo/rd-logistics
-/addons/sale_purchase/ @odoo/rd-logistics
-/addons/sale_stock/ @odoo/rd-logistics
-
-/addons/sms/ @odoo/rd-discuss
-/addons/sms/**/*.py @odoo/rd-discuss @odoo/rd-sm
-
-/addons/snailmail/ @odoo/rd-discuss
-/addons/snailmail/models/ir_qweb_fields.py @odoo/rd-discuss @odoo/rd-website
-
-/addons/stock/ @odoo/rd-logistics
-/addons/stock_account/ @odoo/rd-logistics
-/addons/stock_dropshipping/ @odoo/rd-logistics
-/addons/stock_landed_costs/ @odoo/rd-logistics
-/addons/stock_picking_batch/ @odoo/rd-logistics
-
-/addons/test_mail/ @odoo/rd-discuss @odoo/rd-sm
-/addons/test_mass_mailing/ @odoo/rd-sm
-/addons/test_website/ @odoo/rd-website
-
-/addons/web/ @odoo/rd-framework-js
-/addons/web/controllers/main.py @odoo/rd-framework-js @odoo/rd-images @odoo/rd-security 
-/addons/web/models/ir_qweb.py @odoo/rd-framework-js @odoo/rd-images @odoo/rd-website
-/addons/web/tests/test_image.py @odoo/rd-images
-
-/addons/web_editor/models/ir_qweb.py @odoo/rd-website
-
-/addons/web_kanban_gauge/ @odoo/rd-framework-js
-
-/addons/web_unsplash/models/ir_qweb.py @odoo/rd-website
-
-/addons/website/models/ir_qweb.py @odoo/rd-website
-/addons/website/models/ir_qweb_fields.py @odoo/rd-website
-
-/addons/website_livechat/ @odoo/rd-discuss @odoo/rd-website
-
-/addons/website_sale/tests/test_website_sale_image.py @odoo/rd-images @odoo/rd-website
-
-/odoo/addons/base/models/assetsbundle.py @odoo/rd-framework-js
-/odoo/addons/base/models/ir_attachment.py @odoo/rd-images
-/odoo/addons/base/models/ir_qweb.py @odoo/rd-website
-/odoo/addons/base/models/ir_qweb_fields.py @odoo/rd-website
-/odoo/addons/base/models/qweb.py @odoo/rd-website
-
-/odoo/addons/base/tests/test_image.py @odoo/rd-images
-/odoo/addons/base/tests/test_ir_http.py @odoo/rd-website
-
-/odoo/cli/ts_config.py @odoo/rd-framework-js
-
-/odoo/modules/migration.py @odoo/upgrade
-
-# expression, query
-/odoo/osv/ @odoo/rd-security
-
-# safe_eval, mimetypes, float_utils, mail sanitizer, image utils, ..
-/odoo/tools/ @odoo/rd-security
-/odoo/tools/image.py @odoo/rd-images @odoo/rd-security
-/odoo/tools/js_transpiler.py @odoo/rd-framework-js @odoo/rd-security
-/odoo/tools/mimetypes.py @odoo/rd-images @odoo/rd-security
-/odoo/tools/sourcemap_generator.py @odoo/rd-framework-js @odoo/rd-security
-
-/odoo/http.py @odoo/rd-security @odoo/rd-website
-/odoo/sql_db.py @odoo/rd-security