chore(coderd): remove the window option in open_in (#16104)

As we worked on adding a `open_in` parameter for workspace_apps - we
initially created three options :
- window
- slim_window
- tab

After further investigation, `window` should not be used and has to be
removed.

ℹ️ I decided to remove the option instead of deprecating it as we've not
created any release nor documented the feature. Can be discussed.

docs/reference/api/builds.md

@@ -809,7 +809,6 @@ Status Code **200**
 | `health`                  | `healthy`          |
 | `health`                  | `unhealthy`        |
 | `open_in`                 | `slim-window`      |
-| `open_in`                 | `window`           |
 | `open_in`                 | `tab`              |
 | `sharing_level`           | `owner`            |
 | `sharing_level`           | `authenticated`    |
@@ -1447,7 +1446,6 @@ Status Code **200**
 | `health`                  | `healthy`                     |
 | `health`                  | `unhealthy`                   |
 | `open_in`                 | `slim-window`                 |
-| `open_in`                 | `window`                      |
 | `open_in`                 | `tab`                         |
 | `sharing_level`           | `owner`                       |
 | `sharing_level`           | `authenticated`               |

docs/reference/api/schemas.md

@@ -7652,7 +7652,6 @@ If the schedule is empty, the user will be updated to use the default schedule.|
 | Value         |
 |---------------|
 | `slim-window` |
-| `window`      |
 | `tab`         |
 
 ## codersdk.WorkspaceAppSharingLevel

docs/reference/api/templates.md

@@ -2281,7 +2281,6 @@ Status Code **200**
 | `health`                  | `healthy`          |
 | `health`                  | `unhealthy`        |
 | `open_in`                 | `slim-window`      |
-| `open_in`                 | `window`           |
 | `open_in`                 | `tab`              |
 | `sharing_level`           | `owner`            |
 | `sharing_level`           | `authenticated`    |
@@ -2716,7 +2715,6 @@ Status Code **200**
 | `health`                  | `healthy`          |
 | `health`                  | `unhealthy`        |
 | `open_in`                 | `slim-window`      |
-| `open_in`                 | `window`           |
 | `open_in`                 | `tab`              |
 | `sharing_level`           | `owner`            |
 | `sharing_level`           | `authenticated`    |