meta-phosphor: maintainers: remove subtree words

Remove wording about a special case patch submission process.
meta-phosphor now follows the same patch submission process
as every other OpenBMC project.

(From meta-phosphor rev: db9fdae8d12912e2608e91a71da97611bc6b158a)

Change-Id: I5d08c97431abf997f052faf7ab708104c69c28f6
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meta-phosphor/MAINTAINERS b/meta-phosphor/MAINTAINERS
index 4377104..842b167 100644
--- a/meta-phosphor/MAINTAINERS
+++ b/meta-phosphor/MAINTAINERS
@@ -42,8 +42,5 @@
 START OF MAINTAINERS LIST
 -------------------------
 
-# THIS REPOSITORY HAS A DIFFERENT SUBMISSION PROCESS: this is a subtree in
-# @openbmc and is synced by the maintainer using git-subtree. Please submit
-# changes against @openbmc.
 M:  Brad Bishop <bradleyb@fuzziesquirrel.com> <radsquirrel!>
 R:  Ed Tanous <ed.tanous@intel.com> <EdTanous!>