Remove HostPrefer32BitExecutables

HOST_PREFER_32_BIT was used during the switch to 64-bit host tools to
keep the SDK building as 32-bit, but is never set any more.

Change-Id: I7c2db269d3f7fa1f4e0c022cbced789755a62d81
diff --git a/cc/binary.go b/cc/binary.go
index 38fc938..b6d66dd 100644
--- a/cc/binary.go
+++ b/cc/binary.go
@@ -168,13 +168,11 @@
 		if binary.Properties.Stem == "" && binary.Properties.Suffix == "" {
 			ctx.PropertyErrorf("symlink_preferred_arch", "must also specify stem or suffix")
 		}
-		var prefer bool
-		if ctx.Host() {
-			prefer = ctx.AConfig().HostPrefer32BitExecutables()
-		} else {
-			prefer = ctx.AConfig().DevicePrefer32BitExecutables()
+		prefer32 := false
+		if ctx.Device() {
+			prefer32 = ctx.AConfig().DevicePrefer32BitExecutables()
 		}
-		if ctx.PrimaryArch() != prefer {
+		if ctx.PrimaryArch() != prefer32 {
 			binary.baseInstaller.Properties.Symlinks = append(binary.baseInstaller.Properties.Symlinks,
 				ctx.ModuleName())
 		}