get rid of mention of --with-giza arg

BUILD-INSTRUCTIONS.txt

@@ -8,7 +8,7 @@ available at http://boost.org .
 
 There are several optional dependencies:
 
-GIZA++ from http://code.google.com/p/giza-pp/ is used to build phrase tables.
+GIZA++ from http://code.google.com/p/giza-pp/ is used to align words in the parallel corpus during training.
 
 Moses server requires xmlrpc-c with abyss-server.  Source is available from
 http://xmlrpc-c.sourceforge.net/.  
@@ -85,7 +85,6 @@ Building consists of running
 Common options are:
 --with-srilm=/path/to/srilm to compile the decoder with SRILM support
 --with-irstlm=/path/to/irstlm to compile the decoder with IRSTLM support
---with-giza=/path/to/giza to enable training scripts
 -jN where N is the number of CPUs
 
 --with-macports=/path/to/macports use MacPorts on Mac OS X.

Jamroot

@@ -15,10 +15,6 @@
 #Note that, like language models, this is the --prefix where the library was
 #installed, not some executable within the library.  
 #
-#--with-giza=/path/to/giza 
-#Indicates where binaries GIZA++, snt2cooc.out, and mkcls live.  
-#Builds scripts/training/train-model.perl using these paths. 
-#
 #Thread-caching malloc (optional):
 #--with-tcmalloc
 #

scripts/Jamfile

@@ -26,7 +26,7 @@ if $(with-giza) {
   check-for-bin mkcls ;
 } else {
   if $(CLEANING) = no {
-    echo "If you want scripts/training/train-model.perl, pass --with-giza=/path/to/giza-pp" ;
+    #echo "If you want scripts/training/train-model.perl, pass --with-giza=/path/to/giza-pp" ;
   }
   constant WITH-GIZA : "no" ;
 }