docs: remove unused "registry" parameter

The "registry" query-param was in added 10c0e99037,
and removed in docker 0.5.0 via 66a9d06d9f.

Aparently, it was never removed from the documentation,
and included in all versions of the API docs.

This removes it from the documentation.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
(cherry picked from commit e035a86c1d)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

docs/reference/api/docker_remote_api_v1.14.md

@@ -844,7 +844,6 @@ Query Parameters:
 -   **fromSrc** – source to import, - means stdin
 -   **repo** – repository
 -   **tag** – tag
--   **registry** – the registry to pull from
 
 Request Headers:
 

docs/reference/api/docker_remote_api_v1.15.md

@@ -994,7 +994,6 @@ Query Parameters:
         can be retrieved or `-` to read the image from the request body.
 -   **repo** – repository
 -   **tag** – tag
--   **registry** – the registry to pull from
 
     Request Headers:
 

docs/reference/api/docker_remote_api_v1.16.md

@@ -942,7 +942,6 @@ Query Parameters:
         can be retrieved or `-` to read the image from the request body.
 -   **repo** – repository
 -   **tag** – tag
--   **registry** – the registry to pull from
 
     Request Headers:
 

docs/reference/api/docker_remote_api_v1.17.md

@@ -1155,7 +1155,6 @@ Query Parameters:
         can be retrieved or `-` to read the image from the request body.
 -   **repo** – repository
 -   **tag** – tag
--   **registry** – the registry to pull from
 
     Request Headers:
 

docs/reference/api/docker_remote_api_v1.18.md

@@ -1252,7 +1252,6 @@ Query Parameters:
         can be retrieved or `-` to read the image from the request body.
 -   **repo** – repository
 -   **tag** – tag
--   **registry** – the registry to pull from
 
     Request Headers:
 

docs/reference/api/docker_remote_api_v1.19.md

@@ -1301,7 +1301,6 @@ Query Parameters:
         can be retrieved or `-` to read the image from the request body.
 -   **repo** – Repository name.
 -   **tag** – Tag.
--   **registry** – The registry to pull from.
 
     Request Headers:
 

docs/reference/api/docker_remote_api_v1.20.md

@@ -1443,7 +1443,6 @@ Query Parameters:
         can be retrieved or `-` to read the image from the request body.
 -   **repo** – Repository name.
 -   **tag** – Tag.
--   **registry** – The registry to pull from.
 
     Request Headers: