Interop 2026 - closing of proposal submission window (#1159)

Closing the call for Interop 2026 proposals

Author: nairnandu

.github/ISSUE_TEMPLATE/focus-area-proposal.yml

@@ -1,12 +1,10 @@
 # Interop 2026
 
-**Interop 2026 is now open for proposals!** See the [proposal guide](../proposal_guide.md) for details, and how to give your proposal the best chance of success.
-
 Interop 2026 is an effort to increase interoperability across browsers in key technical areas that are of high priority to web developers and end users. More details on the project are available in the [Interop Project README](https://github.com/web-platform-tests/interop/blob/main/README.md).
 
 ## Timeline
 
-**Interop 2026 will open for proposals on September 4, 2025** and the overall timeline is as below. Please note that the timelines are subject to change.
+**Interop 2026 opened for proposals on September 4, 2025** and the overall timeline is as below. Please note that the timelines are subject to change.
 - Proposal submission window (~3 weeks): Sept 4th, 2025 through Sept 24th, 2025
 - Proposal selection: Before December 11th 2025
 - Scope of the Interop 2026 project published: the first half of February, 2026.

.github/ISSUE_TEMPLATE/investigation-effort-proposal.yml

@@ -2,13 +2,8 @@
 
 Welcome to the Interop Project, an ongoing effort to make the web more interoperable in key areas, prioritized by user and web developer needs. This is part of [the web-platform-tests project](https://github.com/web-platform-tests/wpt), the main test suite for the web platform, and worked on by the [Interop Team](./charter.md).
 
-Please see the [Interop 2024 Dashboard](https://wpt.fyi/interop-2024) and [Interop 2024 README](./2024/README.md) for the current iteration of the project!
-
-Please see the [Interop 2025 README](./2025/README.md) for the ongoing planning of Interop 2025, which will be announced in early 2025.
-
-## Proposing a focus area for 2026
-
-**Interop 2026 is now open for proposals!** See the [proposal guide](./proposal_guide.md) for details, and how to give your proposal the best chance of success.
+Please see the [Interop 2025 Dashboard](https://wpt.fyi/interop-2025) and [Interop 2025 README](./2025/README.md) for the current iteration of the project!
+Please see the [Interop 2026 README](./2026/README.md) for the ongoing planning of Interop 2026, which will be announced in early 2026.
 
 ## The Purpose of the Interop Project