Do not check existence of 'npm-shrinkwrap.json'

Gruntfile.js

@@ -106,20 +106,13 @@ module.exports = function (grunt) {
     grunt.log.writeln('');
   }
 
-  var duplicatedModules;
-
-  try {
-    duplicatedModules = lockedDependencies.checkDuplicatedDependencies(require('./npm-shrinkwrap.json'), LOCKED_MODULES_TO_VALIDATE);
-
-    if (duplicatedModules.length > 0) {
-      grunt.log.fail('############### /!\\ CAUTION /!\\ #################');
-      grunt.log.fail('Duplicated dependencies found in npm-shrinkwrap.json file.');
-      grunt.log.fail(JSON.stringify(duplicatedModules, null, 4));
-      grunt.log.fail('#################################################');
-      process.exit(1);
-    }
-  } catch (e) {
-    grunt.log.fail('Lock file "npm-shrinkwrap.json" does not exist. Skiping duplicated modules check.');
+  var duplicatedModules = lockedDependencies.checkDuplicatedDependencies(require('./npm-shrinkwrap.json'), LOCKED_MODULES_TO_VALIDATE);
+  if (duplicatedModules.length > 0) {
+    grunt.log.fail('############### /!\\ CAUTION /!\\ #################');
+    grunt.log.fail('Duplicated dependencies found in npm-shrinkwrap.json file.');
+    grunt.log.fail(JSON.stringify(duplicatedModules, null, 4));
+    grunt.log.fail('#################################################');
+    process.exit(1);
   }
 
   duplicatedModules = lockedDependencies.checkDuplicatedDependencies(require('./package-lock.json'), LOCKED_MODULES_TO_VALIDATE);