no local binaries, so removing useVersion method

Author: captDaylight

wrapper.js

@@ -196,10 +196,6 @@ function setupMethods (soljson) {
     supportsMulti: compileJSONMulti !== null,
     supportsImportCallback: compileJSONCallback !== null,
     supportsStandard: compileStandard !== null,
-    // Use the given version if available.
-    useVersion: function (versionString) {
-      return setupMethods(require('./bin/soljson-' + versionString + '.js'));
-    },
     // Loads the compiler of the given version from the github repository
     // instead of from the local filesystem.
     loadRemoteVersion: function (versionString, cb) {