fileio: drop "newline" parameter for env file parsers

Now that we don't (mis-)use the env file parser to parse kernel command
lines there's no need anymore to override the used newline character
set. Let's hence drop the argument and just "\n\r" always. This nicely
simplifies our code.

src/core/execute.c

@@ -3961,7 +3961,7 @@ static int exec_context_load_environment(const Unit *unit, const ExecContext *c,
                 assert(pglob.gl_pathc > 0);
 
                 for (n = 0; n < pglob.gl_pathc; n++) {
-                        k = load_env_file(NULL, pglob.gl_pathv[n], NULL, &p);
+                        k = load_env_file(NULL, pglob.gl_pathv[n], &p);
                         if (k < 0) {
                                 if (ignore)
                                         continue;