Reove unused param show_headings

src/administrator/components/com_weblinks/config.xml

@@ -337,17 +337,6 @@
 			<option value="0">JHIDE</option>
 		</field>
 
-		<field
-			name="show_headings"
-			type="radio"
-			layout="joomla.form.field.radio.switcher"
-			default="1"
-			label="JGLOBAL_SHOW_HEADINGS_LABEL"
-			>
-			<option value="0">JHIDE</option>
-			<option value="1">JSHOW</option>
-		</field>
-
 		<field
 			name="show_link_description"
 			type="radio"

src/components/com_weblinks/tmpl/categories/default.xml

@@ -217,18 +217,6 @@
 				<option value="1">JSHOW</option>
 			</field>
 
-			<field
-				name="show_headings"
-				type="list"
-				label="JGLOBAL_SHOW_HEADINGS_LABEL"
-				useglobal="true"
-				class="form-select-color-state"
-				validate="options"
-				>
-				<option value="0">JHIDE</option>
-				<option value="1">JSHOW</option>
-			</field>
-
 			<field
 				name="show_link_description"
 				type="list"

src/components/com_weblinks/tmpl/category/default.xml

@@ -137,17 +137,6 @@
 				<option value="1">JSHOW</option>
 			</field>
 
-			<field
-				name="show_headings"
-				type="list"
-				label="JGLOBAL_SHOW_HEADINGS_LABEL"
-				useglobal="true"
-				class="form-select-color-state"
-				>
-				<option value="0">JHIDE</option>
-				<option value="1">JSHOW</option>
-			</field>
-
 			<field
 				name="show_link_description"
 				type="list"