Remove kickback/talkback/soundback from SDK.

These apps are not in the AOSP tree and cannot be part of the standard SDK
build.

They are available at http://code.google.com/p/eyes-free/

target/product/sdk.mk

@@ -25,10 +25,7 @@ PRODUCT_PACKAGES := \
 	libwnndict \
 	ApiDemos \
 	GestureBuilder \
-	SoftKeyboard \
+	SoftKeyboard
-	talkback \
-	soundback \
-	kickback
 
 PRODUCT_COPY_FILES := \
 	development/data/etc/vold.conf:system/etc/vold.conf