meson: remove sdbusplus include-type

sdbusplus now behaves this way by default, so we do not need to
replicate in each project that uses it.

Change-Id: I99342152714ec29972373fb872804cd4d508e0fe
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/meson.build b/meson.build
index 4acc81d..6b98f8c 100644
--- a/meson.build
+++ b/meson.build
@@ -36,7 +36,7 @@
 endif
 
 nlohmann_json_dep = dependency('nlohmann_json', include_type: 'system')
-sdbusplus = dependency('sdbusplus', include_type: 'system')
+sdbusplus = dependency('sdbusplus')
 phosphor_logging_dep = dependency('phosphor-logging')
 
 if get_option('gpio-presence') or get_option('tests').allowed()