Slim down chooseproduct (used by choosecombo).

People keep getting confused by the default products
in this list, which are almost never what they want,
because this list roughly corresponds to the DEVICES
and not the PRODUCTS.

Now that lunch works again, I'm not too worried about
choosecombo except for the couple of cases lunch can't
handle, like the simulator.  Therefore, this change
just removes the list of suggested products, and you
have to know which one you're trying to build (which
seems like a resonable prerequisite).

envsetup.sh

@@ -289,30 +289,6 @@ function choosetype()
 #
 function chooseproduct()
 {
-    # Find the makefiles that must exist for a product.
-    # Send stderr to /dev/null in case partner isn't present.
-    local -a choices
-    choices=(`/bin/ls build/target/board/*/BoardConfig.mk vendor/*/*/BoardConfig.mk 2> /dev/null`)
-
-    local choice
-    local -a prodlist
-    for choice in ${choices[@]}
-    do
-        # The product name is the name of the directory containing
-        # the makefile we found, above.
-        prodlist=(${prodlist[@]} `dirname ${choice} | xargs basename`)
-    done
-
-    local index=1
-    local p
-    echo "Product choices are:"
-    for p in ${prodlist[@]}
-    do
-        echo "     $index. $p"
-        let "index = $index + 1"
-    done
-
-
     if [ "x$TARGET_PRODUCT" != x ] ; then
         default_value=$TARGET_PRODUCT
     else
@@ -327,8 +303,7 @@ function chooseproduct()
     local ANSWER
     while [ -z "$TARGET_PRODUCT" ]
     do
-        echo "You can also type the name of a product if you know it."
+        echo -n "Which product would you like? [$default_value] "
-        echo -n "Which would you like? [$default_value] "
         if [ -z "$1" ] ; then
             read ANSWER
         else
@@ -338,13 +313,6 @@ function chooseproduct()
 
         if [ -z "$ANSWER" ] ; then
             export TARGET_PRODUCT=$default_value
-        elif (echo -n $ANSWER | grep -q -e "^[0-9][0-9]*$") ; then
-            local poo=`echo -n $ANSWER`
-            if [ $poo -le ${#prodlist[@]} ] ; then
-                export TARGET_PRODUCT=${prodlist[$(($ANSWER-$_arrayoffset))]}
-            else
-                echo "** Bad product selection: $ANSWER"
-            fi
         else
             if check_product $ANSWER
             then