Revert "[Autocomplete] Show warning icon if invalid option was typed"

This reverts commit 307320b3ff.

platform/forms/res/templates/controls/autocomplete.html

@@ -26,7 +26,6 @@
            type="text"
            ng-model="ngModel[field]"
            ng-change="filterOptions(ngModel[field])"
-           ng-init="filterOptions(ngModel[field])"
            ng-click="inputClicked()"
            ng-keydown="keyDown($event)"/>
     <span class="icon-arrow-down"
@@ -44,7 +43,4 @@
             </li>
         </ul>  
     </div>
-    <span class="icon-x autocompleteWarning"
-          ng-show="invalidOption">
-    </span>
 </div>

platform/forms/src/controllers/AutocompleteController.js

@@ -111,7 +111,6 @@ define(
                         name: option
                     };
                 });
-                $scope.invalidOption = $scope.filteredOptions.length === 0;
             };
 
             $scope.inputClicked = function () {

platform/forms/test/controllers/AutocompleteControllerSpec.js

@@ -53,11 +53,6 @@ define([
             expect(mockScope.filteredOptions).toEqual(filteredOptions);
         });
 
-        it("checks if invalid option was typed", function () {
-            mockScope.filterOptions('openmct');
-            expect(mockScope.invalidOption).toEqual(true);
-        });
-
         it("fills input with given string", function () {
             var str = "UTC";
             mockScope.fillInput(str);