Revert "FORMS-14013 - Fixing default value check in dropdown (#1199)"

This reverts commit 63e3561.

Author: rismehta

ui.af.apps/src/main/content/jcr_root/apps/core/fd/components/form/dropdown/v1/dropdown/dropdown.html

@@ -46,7 +46,7 @@
             data-sly-attribute.multiple="${dropdown.isMultiSelect ? 'multiple' : ''}"
             aria-readonly="${dropdown.readOnly ? 'true' : ''}">
         <div data-sly-test.isPlaceHolderSet="${dropdown.placeHolder != null}" data-sly-unwrap></div>
-        <option data-sly-test="${!isPlaceHolderSet}" disabled selected></option>
+        <option data-sly-test="${!isPlaceHolderSet}"  style="display: none;"></option>
         <option data-sly-test="${isPlaceHolderSet}" value="" disabled selected>${dropdown.placeHolder}</option>
         <div data-sly-list.enumName="${dropdown.enumNames}" data-sly-unwrap>
             <div data-sly-test="${enumName != null && dropdown.enums[enumNameList.index] != null}" data-sly-unwrap>