CLN: Remove unused db setup_env.sh commands (#45042)

Author: mroeschke

ci/setup_env.sh

@@ -87,11 +87,6 @@ echo "w/o removing anything else"
 conda remove pandas -y --force || true
 pip uninstall -y pandas || true
 
-echo
-echo "remove postgres if has been installed with conda"
-echo "we use the one from the CI"
-conda remove postgresql -y --force || true
-
 echo
 echo "remove qt"
 echo "causes problems with the clipboard, we use xsel for that"
@@ -117,13 +112,4 @@ echo
 echo "conda list"
 conda list
 
-# Install DB for Linux
-
-if [[ -n ${SQL:0} ]]; then
-  echo "installing dbs"
-  mysql -e 'create database pandas_nosetest;'
-  psql -c 'create database pandas_nosetest;' -U postgres
-else
-   echo "not using dbs on non-linux Travis builds or Azure Pipelines"
-fi
 echo "done"