Removes note and link to closed gitaly issue

doc/settings/environment-variables.md

@@ -28,8 +28,7 @@ might be required if you are behind a proxy:
 # Needed for proxying Git clones
 gitaly['env'] = {
     "http_proxy" => "http://USERNAME:PASSWORD@example.com:8080",
-    "https_proxy" => "http://USERNAME:PASSWORD@example.com:8080",
-    "no_proxy" => "unix"  # Workaround for https://gitlab.com/gitlab-org/gitaly/-/issues/1447
+    "https_proxy" => "http://USERNAME:PASSWORD@example.com:8080"
 }
 gitlab_workhorse['env'] = {
@@ -49,14 +48,6 @@ registry['env'] = {
 }
 ```
-NOTE: **Note:**
-The `no_proxy` entry for Gitaly is needed in GitLab 11.6
-and newer if a proxy is defined and Gitaly is listening on a UNIX
-socket, which it is by default. It appears to be a limitation in the
-gRPC client library. See [the Gitaly
-issue](https://gitlab.com/gitlab-org/gitaly/-/issues/1447) for more
-details.
-
 NOTE: **Note:**
 GitLab 11.6 and newer will attempt to use HTTP Basic
 Authentication when a username and password is included in the proxy