Removes commented out imports in polyfills.ts

Keeps structure for future potential use

web/src/polyfills.ts

@@ -18,38 +18,6 @@
  * BROWSER POLYFILLS
  */
 
-/** IE9, IE10 and IE11 requires all of the following polyfills. **/
-// import 'core-js/es6/symbol';
-// import 'core-js/es6/object';
-// import 'core-js/es6/function';
-// import 'core-js/es6/parse-int';
-// import 'core-js/es6/parse-float';
-// import 'core-js/es6/number';
-// import 'core-js/es6/math';
-// import 'core-js/es6/string';
-// import 'core-js/es6/date';
-// import 'core-js/es6/array';
-// import 'core-js/es6/regexp';
-// import 'core-js/es6/map';
-// import 'core-js/es6/set';
-
-/** IE10 and IE11 requires the following for NgClass support on SVG elements */
-// import 'classlist.js';  // Run `npm install --save classlist.js`.
-
-/** IE10 and IE11 requires the following to support `@angular/animation`. */
-// import 'web-animations-js';  // Run `npm install --save web-animations-js`.
-
-
-/** Evergreen browsers require these. **/
-// import 'core-js/es6/reflect';
-// import 'core-js/es7/reflect';
-
-
-/** ALL Firefox browsers require the following to support `@angular/animation`. **/
-// import 'web-animations-js';  // Run `npm install --save web-animations-js`.
-
-
-
 /***************************************************************************************************
  * Zone JS is required by Angular itself.
  */
@@ -59,9 +27,3 @@ import 'zone.js/dist/zone-mix'; // Included with Angular CLI.
 /***************************************************************************************************
  * APPLICATION IMPORTS
  */
-
-/**
- * Date, currency, decimal and percent pipes.
- * Needed for: All but Chrome, Firefox, Edge, IE11 and Safari 10
- */
-// import 'intl';  // Run `npm install --save intl`.