Remove sudo command from CI

Author: mpilgrem

.github/workflows/integration-tests.yml

@@ -202,12 +202,6 @@ jobs:
       run: |
         set -ex
 
-        # The release.hs script depends on digest, and digest requires
-        # pkg-config. TO DO: Perhaps the self-hosted runner's software should
-        # include pkg-config.
-        sudo apt-get update
-        sudo apt-get install -y pkg-config
-
         # As of 19 August 2023, the self-hosted runner comes with Stack 2.11.1,
         # but it is not on the PATH. Logging the version for information.
         /usr/local/bin/stack --version