README: Reword cleaning the repo

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

Change-Id: I6d0859b7c7cb325abf3940b21324211b1e9b3757
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/README.md b/README.md
index b6fce54..0e5d6f1 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@
     2. ./configure ${CONFIGURE_FLAGS}
     3. make
 
-To full clean the repository again run `./bootstrap.sh clean`.
+To clean the repository run `./bootstrap.sh clean`.
 ```
 
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