Remove Fuchsia support from Soong

Bug: 194215932
Test: m checkbuild
Change-Id: Id7d3964d9417f8b0938af9b168bb4c00cebe9390

cc/sabi.go

@@ -101,10 +101,6 @@ func classifySourceAbiDump(ctx android.BaseModuleContext) string {
 // Called from sabiDepsMutator to check whether ABI dumps should be created for this module.
 // ctx should be wrapping a native library type module.
 func shouldCreateSourceAbiDumpForLibrary(ctx android.BaseModuleContext) bool {
-	if ctx.Fuchsia() {
-		return false
-	}
-
 	// Only generate ABI dump for device modules.
 	if !ctx.Device() {
 		return false