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/apex.go b/apex/apex.go
index 20660d3..33188cb 100644
--- a/apex/apex.go
+++ b/apex/apex.go
@@ -424,9 +424,8 @@
 	isCompressed bool
 
 	// Path of API coverage generate file
-	nativeApisUsedByModuleFile   android.ModuleOutPath
-	nativeApisBackedByModuleFile android.ModuleOutPath
-	javaApisUsedByModuleFile     android.ModuleOutPath
+	apisUsedByModuleFile   android.ModuleOutPath
+	apisBackedByModuleFile android.ModuleOutPath
 
 	// Collect the module directory for IDE info in java/jdeps.go.
 	modulePaths []string