bug#36828: 27.0.50; Uninstalled emacs shows installed documentation

[Óscar Fuentes]

The previous patch contains an undefined variable result of an
incomplete renaming. Fixed here:

modified   src/callproc.c
@@ -1560,21 +1560,13 @@ init_callproc (void)
      source directory.  */
   if (data_dir == 0)
     {
-      Lisp_Object tem, srcdir;
+      Lisp_Object tem, etcdir;
       Lisp_Object lispdir = Fcar (decode_env_path (0, PATH_DUMPLOADSEARCH, 0));
 
-      srcdir = Fexpand_file_name (build_string ("../src/"), lispdir);
-
-      tem = Fexpand_file_name (build_string ("NEWS"), Vdata_directory);
-      if (!NILP (Fequal (srcdir, Vinvocation_directory))
-         || NILP (Ffile_exists_p (tem)))
-       {
-         Lisp_Object newdir;
-         newdir = Fexpand_file_name (build_string ("../etc/"), lispdir);
-         tem = Fexpand_file_name (build_string ("NEWS"), newdir);
-         if (!NILP (Ffile_exists_p (tem)))
-           Vdata_directory = newdir;
-       }
+      etcdir = Fexpand_file_name (build_string ("../etc/"), lispdir);
+      tem = Fexpand_file_name (build_string ("NEWS"), etcdir);
+      if (!NILP (Ffile_exists_p (tem)))
+        Vdata_directory = etcdir;
     }
 
   if (!will_dump_p ())