build: Tests should default to auto not enabled

The CI and other environments will explicitly enable them as needed, by
default we don't want to force building them.

Change-Id: Ie7790f2b586525f292a5a649c35e763d14cdc9e7
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/meson_options.txt b/meson_options.txt
index 0b6f579..d7961ac 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -1,4 +1,4 @@
-option('tests', type : 'feature', description : 'Build tests', value: 'enabled')
+option('tests', type : 'feature', description : 'Build tests')
 option('use-json', type : 'feature', description : 'LEDs JSON filepath', value: 'disabled')
 option('use-lamp-test', type : 'feature', description : 'LEDs lamp test configuration', value: 'disabled')
 option('monitor-operational-status', type : 'feature', description : 'Enable OperationalStatus monitor', value: 'disabled')