README: Reword cleaning the repo

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

Change-Id: Iffb30671a82055bedfb26677b18a71e366774fed
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/README.md b/README.md
index 28e8d67..7606047 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@
     2. ./configure ${CONFIGURE_FLAGS} --prefix=/usr
     3. make
 
-To full clean the repository again run `./bootstrap.sh clean`.
+To clean the repository run `./bootstrap.sh clean`.
 ```
 
 ```