Porting same changes to JS

javascript/i18n/phonenumbers/phonenumberutil.js

diff --git a/javascript/i18n/phonenumbers/phonenumberutil.js b/javascript/i18n/phonenumbers/phonenumberutil.js
index c52279d..808b11e 100644
--- a/javascript/i18n/phonenumbers/phonenumberutil.js
+++ b/javascript/i18n/phonenumbers/phonenumberutil.js
@@ -1935,16 +1935,6 @@
           // carriers won't connect the call. Because of that, we return an
           // empty string here.
           '';
-    } else if (isValidNumber && regionCode == 'HU') {
-      // The national format for HU numbers doesn't contain the national prefix,
-      // because that is how numbers are normally written down. However, the
-      // national prefix is obligatory when dialing from a mobile phone. As a
-      // result, we add it back here if it is a valid regular length phone
-      // number.
-      formattedNumber =
-          this.getNddPrefixForRegion(regionCode, true /* strip non-digits */) +
-          ' ' + this.format(numberNoExt,
-              i18n.phonenumbers.PhoneNumberFormat.NATIONAL);
     } else if (countryCallingCode ==
                i18n.phonenumbers.PhoneNumberUtil.NANPA_COUNTRY_CODE_) {
       // For NANPA countries, we output international format for numbers that

javascript/i18n/phonenumbers/phonenumberutil_test.js

diff --git a/javascript/i18n/phonenumbers/phonenumberutil_test.js b/javascript/i18n/phonenumbers/phonenumberutil_test.js
index b0d9e6d..69b2e34 100644
--- a/javascript/i18n/phonenumbers/phonenumberutil_test.js
+++ b/javascript/i18n/phonenumbers/phonenumberutil_test.js
@@ -1196,28 +1196,6 @@
       phoneUtil.formatNumberForMobileDialing(deShortNumber,
                                              RegionCode.IT, false));
 
-  // Test the special logic for Hungary, where the national prefix must be added
-  // before dialing from a mobile phone for regular length numbers, but not for
-  // short numbers.
-  var huRegularNumber = new i18n.phonenumbers.PhoneNumber();
-  huRegularNumber.setCountryCode(36);
-  huRegularNumber.setNationalNumber(301234567);
-  assertEquals('06301234567',
-      phoneUtil.formatNumberForMobileDialing(huRegularNumber,
-                                             RegionCode.HU, false));
-  assertEquals('+36301234567',
-      phoneUtil.formatNumberForMobileDialing(huRegularNumber,
-                                             RegionCode.JP, false));
-  var huShortNumber = new i18n.phonenumbers.PhoneNumber();
-  huShortNumber.setCountryCode(36);
-  huShortNumber.setNationalNumber(104);
-  assertEquals('104',
-      phoneUtil.formatNumberForMobileDialing(huShortNumber,
-                                             RegionCode.HU, false));
-  assertEquals('',
-      phoneUtil.formatNumberForMobileDialing(huShortNumber,
-                                             RegionCode.JP, false));
-
   // Test the special logic for NANPA countries, for which regular length phone
   // numbers are always output in international format, but short numbers are in
   // national format.