Android: Remove unused build target curl_binary

build/android/Makefile

@@ -168,7 +168,7 @@ endif
 	$(ASSETS_TIMESTAMP) $(LEVELDB_TIMESTAMP) \
 	$(OPENAL_TIMESTAMP) $(OGG_TIMESTAMP) \
 	$(IRRLICHT_TIMESTAMP) $(CURL_TIMESTAMP) \
-	$(OPENSSL_TIMESTAMP) curl_binary \
+	$(OPENSSL_TIMESTAMP) \
 	$(ROOT)/jni/src/android_version.h \
 	$(ROOT)/jni/src/android_version_githash.h
 
@@ -625,18 +625,6 @@ clean_curl :
 	$(RM) -rf deps/curl-${CURL_VERSION}                                        \
 	$(RM) -f deps/curl
 
-
-curl_binary:
-	@if [ ! -d "deps/curl-${CURL_VERSION_BINARY}" ] ; then                     \
-		echo "curl binary missing, downloading...";                           \
-		mkdir -p ${ROOT}/deps;                                                 \
-		cd deps;                                                               \
-		wget http://curl.haxx.se/gknw.net/7.34.0/dist-android/curl-7.34.0-rtmp-ssh2-ssl-zlib-static-bin-android.tar.gz || exit 1;\
-		tar -xzf curl-7.34.0-rtmp-ssh2-ssl-zlib-static-bin-android.tar.gz || exit 1;\
-		mv curl-7.34.0-rtmp-ssh2-ssl-zlib-static-bin-android curl-${CURL_VERSION_BINARY};\
-		rm curl-7.34.0-rtmp-ssh2-ssl-zlib-static-bin-android.tar.gz;           \
-	fi
-
 $(GMP_TIMESTAMP) : gmp_download
 	@LAST_MODIF=$$(find ${GMP_DIR} -type f -printf '%T@ %p\n' | sort -n | tail -1 | cut -f2- -d" "); \
 	if [ $$(basename $$LAST_MODIF) != "timestamp" ] ; then                     \