Remove bootstrap_go_binary .

blueprint_go_binary is enough.

Test: Presubmits.
Change-Id: Ic95ed8533603dff396740bc1d2a7c60ff2cebf20
diff --git a/android/config.go b/android/config.go
index d3db68f..1482e5d 100644
--- a/android/config.go
+++ b/android/config.go
@@ -555,12 +555,10 @@
 
 // BlueprintToolLocation returns the directory containing build system tools
 // from Blueprint, like soong_zip and merge_zips.
-func (c *config) BlueprintToolLocation() string {
+func (c *config) HostToolDir() string {
 	return filepath.Join(c.soongOutDir, "host", c.PrebuiltOS(), "bin")
 }
 
-var _ bootstrap.ConfigBlueprintToolLocation = (*config)(nil)
-
 func (c *config) HostToolPath(ctx PathContext, tool string) Path {
 	return PathForOutput(ctx, "host", c.PrebuiltOS(), "bin", tool)
 }