path-lookup: stop exporting two functions

user_runtime_dir() and user_config_home() are not used externally anymore,
hence let's not export them anymore.

src/shared/path-lookup.c

@@ -34,7 +34,7 @@
 #include "strv.h"
 #include "util.h"
 
-int user_config_home(char **config_home) {
+static int user_config_home(char **config_home) {
         const char *e;
         char *r;
 
@@ -63,7 +63,7 @@ int user_config_home(char **config_home) {
         return 0;
 }
 
-int user_runtime_dir(char **runtime_dir) {
+static int user_runtime_dir(char **runtime_dir) {
         const char *e;
         char *r;
 

src/shared/path-lookup.h

@@ -45,9 +45,6 @@ struct LookupPaths {
         char *root_dir;
 };
 
-int user_config_home(char **config_home);
-int user_runtime_dir(char **runtime_dir);
-
 char **generator_paths(UnitFileScope scope);
 
 int lookup_paths_init(LookupPaths *p, UnitFileScope scope, const char *root_dir);