README: Reword cleaning the repo

Reworded cleaning the repo. The old wording did not make sense.

Change-Id: I422b3683f026e09980169aad90760c6beb3552a5
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/README.md b/README.md
index b2c5f6f..48b29e2 100644
--- a/README.md
+++ b/README.md
@@ -8,5 +8,5 @@
     2. ./configure ${CONFIGURE_FLAGS}
     3. make
 
-To full clean the repository again run `./bootstrap.sh clean`.
+To clean the repository run `./bootstrap.sh clean`.
 ```