Rnmobile/fix link editing on start (#17631)

* Don't try to clear links if text is clean.

* Commented LinkUI removal test when no URL.

* Don't try to remove link if we are at start of link and no actual selection is

packages/format-library/src/link/index.native.js

@@ -94,7 +94,15 @@ export const link = {
 		}
 
 		onRemoveFormat() {
-			const { onChange, speak } = this.props;
+			const { onChange, speak, value } = this.props;
+			const startFormat = getActiveFormat( value, 'core/link' );
+
+			// If the previous position from start doesn't have the link is because we are at the start
+			const linkStart = ! find( value.formats[ value.start - 1 ], startFormat );
+			if ( linkStart && isCollapsed( value ) ) {
+				return;
+			}
+
 			const linkSelection = this.getLinkSelection();
 
 			onChange( removeFormat( linkSelection, name ) );