Temp updates to package.xml for initial Jazzy release (#712)

package.xml

@@ -2,7 +2,7 @@
 <?xml-model href="http://download.ros.org/schema/package_format3.xsd" schematypens="http://www.w3.org/2001/XMLSchema"?>
 <package format="3">
   <name>slam_toolbox</name>
-  <version>2.8.0</version>
+  <version>2.8.1</version>
   <description>
      This package provides a sped up improved slam karto with updated SDK and visualization and modification toolsets
   </description>
@@ -66,7 +66,6 @@
   <exec_depend>tbb</exec_depend>
   <exec_depend>libqt5-core</exec_depend>
   <exec_depend>libqt5-widgets</exec_depend>
-  <exec_depend>nav2_map_server</exec_depend>
   <exec_depend>builtin_interfaces</exec_depend>
   <exec_depend>rosidl_default_generators</exec_depend>
   <exec_depend>lifecycle_msgs</exec_depend>