remove migration brownout, update README re: cessation of support (#13)

README.md

@@ -2,11 +2,11 @@
 
 [![GitHub tag](https://img.shields.io/github/tag/modflowpy/install-gfortran-action.svg)](https://github.com/modflowpy/install-gfortran-action/tags/latest)
 [![CI](https://github.com/modflowpy/install-gfortran-action/actions/workflows/ci.yml/badge.svg?branch=main)](https://github.com/modflowpy/install-gfortran-action/actions/workflows/ci.yml)
-[![Project Status: Inactive – The project has reached a stable, usable state but is no longer being actively developed; support/maintenance will be provided as time allows.](https://www.repostatus.org/badges/latest/inactive.svg)](https://www.repostatus.org/#inactive)
+[![Project Status: Unsupported – The project has reached a stable, usable state but the author(s) have ceased all work on it. A new maintainer may be desired.](https://www.repostatus.org/badges/latest/unsupported.svg)](https://www.repostatus.org/#unsupported)
 
 An action to setup the [GNU Fortran](https://gcc.gnu.org/fortran/) compiler.
 
-**Note:** Maintenance of this action will cease in 2024. If the GCC preinstalled on runner images does not meet your needs, [`fortran-lang/setup-fortran`](https://github.com/fortran-lang/setup-fortran) is recommended.
+**Note:** Maintenance of this action has ceased. If the GCC preinstalled on runner images does not meet your needs, [`fortran-lang/setup-fortran`](https://github.com/fortran-lang/setup-fortran) is recommended.
 
 <!-- START doctoc generated TOC please keep comment here to allow auto update -->
 <!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->

action.yml

@@ -6,15 +6,9 @@ runs:
     - name: Migration warning
       shell: bash
       run: |
-        echo "WARNING: This action will be archived on 01/01/24."
+        echo "WARNING: This action is unsupported."
         echo "Use fortran-lang/setup-fortran instead (https://github.com/fortran-lang/setup-fortran)."
 
-    - name: Migration brownout
-      uses: wpbonelli/schedule-outage@v1
-      with:
-        probability: 0.1
-        message: "This action will be archived on 01/01/24. Use fortran-lang/setup-fortran instead (https://github.com/fortran-lang/setup-fortran)."
-
     - name: Symlink to gfortran (Linux)
       if: runner.os == 'Linux'
       shell: bash
@@ -59,4 +53,4 @@ runs:
       run: |
         gfortran --version
         gcc --version
-        g++ --version
+        g++ --version