Revert "Dexpreopt soong modules inside soong"

This reverts commit 29ff88741e.

Test: none
Bug: 119412419

Android.bp

@@ -224,7 +224,6 @@ bootstrap_go_package {
         "soong",
         "soong-android",
         "soong-cc",
-        "soong-dexpreopt",
         "soong-genrule",
         "soong-java-config",
         "soong-tradefed",
@@ -239,7 +238,6 @@ bootstrap_go_package {
         "java/app.go",
         "java/builder.go",
         "java/dex.go",
-        "java/dexpreopt.go",
         "java/droiddoc.go",
         "java/gen.go",
         "java/genrule.go",