CODEOWNERS: Remove duplicate file from `.github` directory (#10227)

**What this PR does / why we need it**:
This file was added by docs squad some time back
https://github.com/grafana/loki/pull/2454

It's no longer needed as we have [root level
CODEOWNERS](https://github.com/grafana/loki/blob/main/CODEOWNERS) that
has right permissions to docs squad already.

If we need to change anything, we do it here
**Which issue(s) this PR fixes**:
Fixes #<issue number>

**Special notes for your reviewer**:

**Checklist**
- [x] Reviewed the
[`CONTRIBUTING.md`](https://github.com/grafana/loki/blob/main/CONTRIBUTING.md)
guide (**required**)

Signed-off-by: Kaviraj <kavirajkanagaraj@gmail.com>

.github/CODEOWNERS

@@ -1,17 +0,0 @@
-# Lines starting with '#' are comments.
-# Each line is a file pattern followed by one or more owners.
-
-# More details are here: https://help.github.com/articles/about-codeowners/
-
-# The '*' pattern is global owners.
-
-# Order is important. The last matching pattern has the most precedence.
-# The folders are ordered as follows:
-
-# In each subsection folders are ordered first by depth, then alphabetically.
-# This should make it easy to add new rules without breaking existing ones.
-* @grafana/loki-team
-
-# Documentation owner: Grafana Docs Squad
-# Grafana Docs Squad does not own the content, but assists with editing and updates.
-/docs/ @JStickler