Mako overlay: Remove unnecessary enableDreams in config.

Does not differ from the framework default.
Also the name is changing.

Bug:7373284
Change-Id: I4d0cecc37037f8d2d2975cb9ace1927607ef0c2a
diff --git a/overlay/frameworks/base/core/res/res/values/config.xml b/overlay/frameworks/base/core/res/res/values/config.xml
index 706658c..d286852 100644
--- a/overlay/frameworks/base/core/res/res/values/config.xml
+++ b/overlay/frameworks/base/core/res/res/values/config.xml
@@ -203,9 +203,6 @@
         <item>5</item>
     </integer-array>
 
-    <!-- enable screen saver feature -->
-    <bool name="config_enableDreams">true</bool>
-
     <!-- Boolean indicating if restoring network selection should be skipped -->
     <!-- The restoring is handled by modem if it is true -->
     <bool translatable="false" name="skip_restoring_network_selection">true</bool>