Remove compile-sdk constraints from ImmersiveMode sample

This was preventing the Material theme from being applied, since
the sample was only able to access API 19 features.

Change-Id: Ie7745ed270b5ac9869fe0559fbe06ade09ad9eaf
diff --git a/ui/window/ImmersiveMode/template-params.xml b/ui/window/ImmersiveMode/template-params.xml
index e053d26..8959099 100644
--- a/ui/window/ImmersiveMode/template-params.xml
+++ b/ui/window/ImmersiveMode/template-params.xml
@@ -19,8 +19,6 @@
     <group>UI</group>
     <package>com.example.android.immersivemode</package>
     
-    <compileSdkVersion>19</compileSdkVersion>
-
     <!--TODO: change minSdk if needed-->
     <minSdk>4</minSdk>