all: apply modernisers

Signed-off-by: Ophestra <cat@gensokyo.uk>

container/dispatcher_test.go

@@ -235,8 +235,6 @@ func checkOpBehaviour(t *testing.T, testCases []opBehaviourTestCase) {
 	})
 }
 
-func sliceAddr[S any](s []S) *[]S { return &s }
-
 func newCheckedFile(t *testing.T, name, wantData string, closeErr error) osFile {
 	f := &checkedOsFile{t: t, name: name, want: wantData, closeErr: closeErr}
 	// check happens in Close, and cleanup is not guaranteed to run, so relying