Removed uielements package dependency from package.json

Author: ekcoh

Packages/com.unity.inputsystem/package.json

@@ -13,8 +13,5 @@
 		"touch",
 		"vr",
 		"xr"
-	],
-	"dependencies" : {
-		"com.unity.modules.uielements": "1.0.0"
-	}
+	]
 }