move arrayRemove to lang

plugins/pilot/lang.js

@@ -62,6 +62,17 @@ exports.arrayToMap = function(arr) {
 
 };
 
+/**
+ * splice out of 'array' anything that === 'value'
+ */
+exports.arrayRemove = function(array, value) {
+  for (var i = 0; i <= array.length; i++) {
+    if (value === array[i]) {
+      array.splice(i, 1);
+    }
+  }
+};
+
 exports.escapeRegExp = function(str) {
     return str.replace(/([.*+?^${}()|[\]\/\\])/g, '\\$1');
 };