Switch UI tests back to the perf-only runner. (#3349)

.github/workflows/ui_tests.yml

@@ -13,7 +13,7 @@ on:
 jobs:
   tests:
     name: Tests
-    runs-on: macos-14
+    runs-on: perf-only
 
     concurrency:
       # Only allow a single run of this workflow on each branch, automatically cancelling older runs.
@@ -30,9 +30,6 @@ jobs:
           restore-keys: |
             ${{ runner.os }}-gems-
 
-      - name: Free disk space
-        run: ci_scripts/free_space.sh
-
       - name: Setup environment
         run: source ci_scripts/ci_common.sh && setup_github_actions_environment
 

ci_scripts/free_space.sh

@@ -1,15 +0,0 @@
-#!/usr/bin/env bash
-
-#
-# Taken from 
-# https://github.com/actions/runner-images/issues/2840#issuecomment-790492173
-#
-
-set -ux
-
-df -h
-sudo rm -rf /usr/share/dotnet
-sudo rm -rf /opt/ghc
-sudo rm -rf "/usr/local/share/boost"
-sudo rm -rf "$AGENT_TOOLSDIRECTORY"
-df -h