[Telemetry] Move formatter implementation

Move implementation of formatter used for display
of domain values out of plot, and into the telemetry
bundle, from which it can be exposed as a general-use
service. WTD-599.

platform/features/plot/src/elements/PlotFormatter.js

@@ -1,48 +0,0 @@
-/*global define,moment*/
-
-define(
-    ["../../lib/moment.min"],
-    function () {
-        "use strict";
-
-        // Date format to use for domain values; in particular,
-        // use day-of-year instead of month/day
-        var DATE_FORMAT = "YYYY-DDD HH:mm:ss";
-
-        /**
-         * The PlotFormatter is responsible for formatting (as text
-         * for display) values along either the domain or range of a
-         * plot.
-         */
-        function PlotFormatter() {
-            function formatDomainValue(v) {
-                return isNaN(v) ? "" : moment.utc(v).format(DATE_FORMAT);
-            }
-
-            function formatRangeValue(v) {
-                return isNaN(v) ? "" : v.toFixed(1);
-            }
-
-            return {
-                /**
-                 * Format a domain value.
-                 * @param {number} v the domain value; a timestamp
-                 *        in milliseconds since start of 1970
-                 * @returns {string} a textual representation of the
-                 *        data and time, suitable for display.
-                 */
-                formatDomainValue: formatDomainValue,
-                /**
-                 * Format a range value.
-                 * @param {number} v the range value; a numeric value
-                 * @returns {string} a textual representation of the
-                 *        value, suitable for display.
-                 */
-                formatRangeValue: formatRangeValue
-            };
-        }
-
-        return PlotFormatter;
-
-    }
-);