remove shapefile dependency from build

src/tools/contract.cpp

@@ -68,18 +68,11 @@ return_code parseArguments(int argc, char *argv[], contractor::ContractorConfig
             ->default_value(0),
         "Optional for conditional turn restriction parsing, provide a UTC time stamp from "
         "which "
-        "to evaluate the validity of conditional turn restrictions");
-
-    if (updater::SupportsShapefiles())
-    {
-        config_options.add_options()("time-zone-file",
-                                     boost::program_options::value<std::string>(
-                                         &contractor_config.updater_config.tz_file_path)
-                                         ->default_value(""),
-                                     "Required for conditional turn restriction parsing, provide a "
-                                     "shp or dbf file containing "
-                                     "time zone boundaries");
-    }
+        "to evaluate the validity of conditional turn restrictions")(
+        "time-zone-file",
+        boost::program_options::value<std::string>(&contractor_config.updater_config.tz_file_path),
+        "Required for conditional turn restriction parsing, provide a geojson file containing "
+        "time zone boundaries");
 
     // hidden options, will be allowed on command line, but will not be shown to the user
     boost::program_options::options_description hidden_options("Hidden options");