Revert "Temporarily run delete-model-runs on pull_request event for t…

…esting"

This reverts commit 09cfa5b.

.github/workflows/delete-model-runs.yaml

@@ -7,7 +7,17 @@
 name: delete-model-runs
 
 on:
-  pull_request:
+  workflow_dispatch:
+    inputs:
+      run-ids:
+        description: >
+          Run IDs: Space-delimited list of IDs of model runs to delete. Note
+          that the workflow assumes these IDs correspond to model runs for the
+          current assessment cycle, and if that's not the case the deletion
+          script will raise an error.
+        required: true
+        type: string
+        default: 2024-01-01-foo-bar 2024-01-02-bar-baz
 
 jobs:
   delete-model-runs:
@@ -46,4 +56,4 @@ jobs:
         run: Rscript ./R/delete_current_year_model_runs.R "${RUN_IDS// /,}"
         shell: bash
         env:
-          RUN_IDS: 2024-01-01-foo-bar 2024-01-02-bar-baz
+          RUN_IDS: ${{ inputs.run-ids }}