Revert "arc: Add option for ARC-specific download site"

All packages use github now.

This reverts commit 1445b7fd2e46db5d39ad5e2f5cc262574399f5f3.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

arch/Config.in.arc

@@ -12,7 +12,3 @@ config BR2_ENDIAN
 
 config BR2_GCC_TARGET_CPU
 	default "arc700"
-
-config BR2_ARC_SITE
-	string
-	default "http://www.synopsys.com/apps/arc-developer/"