Revert "Add scripts to generate java APIs used by Mainline modules."

This reverts commit c92380f001ce938cf329509491fc3c757ee58a53.

Reason for revert:
DroidMonitor:

DroidMonitor-triggered revert due to breakage
https://android-build.googleplex.com/builds/quarterdeck?branch=git_master&target=mainline_modules_arm64-userdebug&lkgb=7898389&lkbb=7900541&fkbb=7898474,
bug 205746850

Change-Id: Ibd84dfe68dfe150b7e05b4287364d1946375bf72
diff --git a/apex/androidmk.go b/apex/androidmk.go
index 17b2849..94b8116 100644
--- a/apex/androidmk.go
+++ b/apex/androidmk.go
@@ -446,18 +446,23 @@
 					fmt.Fprintf(w, dist)
 				}
 
-				distCoverageFiles(w, "ndk_apis_usedby_apex", a.nativeApisUsedByModuleFile.String())
-				distCoverageFiles(w, "ndk_apis_usedby_apex", a.nativeApisBackedByModuleFile.String())
-				distCoverageFiles(w, "java_apis_used_by_apex", a.javaApisUsedByModuleFile.String())
+				if a.apisUsedByModuleFile.String() != "" {
+					goal := "apps_only"
+					distFile := a.apisUsedByModuleFile.String()
+					fmt.Fprintf(w, "ifneq (,$(filter $(my_register_name),$(TARGET_BUILD_APPS)))\n"+
+						" $(call dist-for-goals,%s,%s:ndk_apis_usedby_apex/$(notdir %s))\n"+
+						"endif\n",
+						goal, distFile, distFile)
+				}
+
+				if a.apisBackedByModuleFile.String() != "" {
+					goal := "apps_only"
+					distFile := a.apisBackedByModuleFile.String()
+					fmt.Fprintf(w, "ifneq (,$(filter $(my_register_name),$(TARGET_BUILD_APPS)))\n"+
+						" $(call dist-for-goals,%s,%s:ndk_apis_backedby_apex/$(notdir %s))\n"+
+						"endif\n",
+						goal, distFile, distFile)
+				}
 			}
 		}}
 }
-
-func distCoverageFiles(w io.Writer, dir string, distfile string) {
-	if distfile != "" {
-		goal := "apps_only"
-		fmt.Fprintf(w, "ifneq (,$(filter $(my_register_name),$(TARGET_BUILD_APPS)))\n"+
-			" $(call dist-for-goals,%s,%s:%s/$(notdir %s))\n"+
-			"endif\n", goal, distfile, dir, distfile)
-	}
-}