feat: removed allowlist_externals

tox.ini

@@ -3,7 +3,7 @@
 # Usage instructions:
 # `tox` will run all tests sequentially, `tox --parallel` will run all tests in parallel (much faster).
 # Run specific selection of tests with `tox -e pretest,<list-of-tests>,posttest` e.g., `tox -e pretest,test-api,test-launcher,posttest`
-# `--parallel` flag can be passed when running specific selections
+# `--parallel` flag can be passed when running specific selections.
 
 [tox]
 description = Default tox environment list and core configurations
@@ -29,9 +29,6 @@ package = external # To allow custom wheel builds
 [testenv:build_external]
 description = Environment for custom build of package wheels, solves PyDPF custom wheel building requirement
 
-allowlist_externals =
-    bash
-
 package_glob = {toxinidir}{/}dist{/}ansys_dpf_core*
 
 # {on_platform} substitution to automatically detect os type.