Revert "Multithread symlink forest removal."

This reverts commit 6b236f1607e4a039700a287ff2368e02f583d6fd.

Reason for revert: Breaks ab/aosp-master-bazel incremental builds. Details on b/254338319

Change-Id: I37eeeda50cff0475d91e7926fdf74216975a0037
diff --git a/bp2build/java_binary_host_conversion_test.go b/bp2build/java_binary_host_conversion_test.go
index 8000477..86f3d42 100644
--- a/bp2build/java_binary_host_conversion_test.go
+++ b/bp2build/java_binary_host_conversion_test.go
@@ -32,7 +32,7 @@
 	}, tc)
 }
 
-var testFs = map[string]string{
+var fs = map[string]string{
 	"test.mf": "Main-Class: com.android.test.MainClass",
 	"other/Android.bp": `cc_library_host_shared {
     name: "jni-lib-1",
@@ -43,7 +43,7 @@
 func TestJavaBinaryHost(t *testing.T) {
 	runJavaBinaryHostTestCase(t, Bp2buildTestCase{
 		Description: "java_binary_host with srcs, exclude_srcs, jni_libs, javacflags, and manifest.",
-		Filesystem:  testFs,
+		Filesystem:  fs,
 		Blueprint: `java_binary_host {
     name: "java-binary-host-1",
     srcs: ["a.java", "b.java"],
@@ -76,7 +76,7 @@
 func TestJavaBinaryHostRuntimeDeps(t *testing.T) {
 	runJavaBinaryHostTestCase(t, Bp2buildTestCase{
 		Description: "java_binary_host with srcs, exclude_srcs, jni_libs, javacflags, and manifest.",
-		Filesystem:  testFs,
+		Filesystem:  fs,
 		Blueprint: `java_binary_host {
     name: "java-binary-host-1",
     static_libs: ["java-dep-1"],