Remove alternative Markdown renderer build options (Glamour performance issues addressed in custom fork; other options need more work)

packaging/resources/apkbuild-source-stable-optimized.sh

@@ -41,7 +41,7 @@ build() {
     esac
 
     # compile binary
-    CGO_ENABLED=1 go build -ldflags=\"-s -w\" -trimpath ./mutn.go
+    CGO_ENABLED=1 go build -ldflags=\"-s -w\" -trimpath -tags=stxAll ./mutn.go
 }
 
 package() {