Revert "Pin javadoc to JDK 11"

Revert submission 2211596

Reason for revert: No longer needed after aosp/2215568

Change-Id: Ia770525501d89baa25e22c2df4fb098d056743f6
diff --git a/java/config/config.go b/java/config/config.go
index b026d73..422f860 100644
--- a/java/config/config.go
+++ b/java/config/config.go
@@ -124,10 +124,6 @@
 		// This is set up and guaranteed by soong_ui
 		return ctx.Config().Getenv("ANDROID_JAVA_HOME")
 	})
-	pctx.VariableFunc("Java11Home", func(ctx android.PackageVarContext) string {
-		// This is set up and guaranteed by soong_ui
-		return ctx.Config().Getenv("ANDROID_JAVA11_HOME")
-	})
 	pctx.VariableFunc("JlinkVersion", func(ctx android.PackageVarContext) string {
 		if override := ctx.Config().Getenv("OVERRIDE_JLINK_VERSION_NUMBER"); override != "" {
 			return override
@@ -141,12 +137,11 @@
 	})
 
 	pctx.SourcePathVariable("JavaToolchain", "${JavaHome}/bin")
-	pctx.SourcePathVariable("Java11Toolchain", "${Java11Home}/bin")
 	pctx.SourcePathVariableWithEnvOverride("JavacCmd",
 		"${JavaToolchain}/javac", "ALTERNATE_JAVAC")
 	pctx.SourcePathVariable("JavaCmd", "${JavaToolchain}/java")
 	pctx.SourcePathVariable("JarCmd", "${JavaToolchain}/jar")
-	pctx.SourcePathVariable("JavadocCmd", "${Java11Toolchain}/javadoc")
+	pctx.SourcePathVariable("JavadocCmd", "${JavaToolchain}/javadoc")
 	pctx.SourcePathVariable("JlinkCmd", "${JavaToolchain}/jlink")
 	pctx.SourcePathVariable("JmodCmd", "${JavaToolchain}/jmod")
 	pctx.SourcePathVariable("JrtFsJar", "${JavaHome}/lib/jrt-fs.jar")
@@ -272,7 +267,7 @@
 
 // JavadocCmd returns a SourcePath object with the path to the java command.
 func JavadocCmd(ctx android.PathContext) android.SourcePath {
-	return java11Tool(ctx, "javadoc")
+	return javaTool(ctx, "javadoc")
 }
 
 func javaTool(ctx android.PathContext, tool string) android.SourcePath {
@@ -286,17 +281,6 @@
 
 }
 
-func java11Tool(ctx android.PathContext, tool string) android.SourcePath {
-	type javaToolKey string
-
-	key := android.NewCustomOnceKey(javaToolKey(tool))
-
-	return ctx.Config().OnceSourcePath(key, func() android.SourcePath {
-		return java11Toolchain(ctx).Join(ctx, tool)
-	})
-
-}
-
 var javaToolchainKey = android.NewOnceKey("javaToolchain")
 
 func javaToolchain(ctx android.PathContext) android.SourcePath {
@@ -305,14 +289,6 @@
 	})
 }
 
-var java11ToolchainKey = android.NewOnceKey("java11Toolchain")
-
-func java11Toolchain(ctx android.PathContext) android.SourcePath {
-	return ctx.Config().OnceSourcePath(java11ToolchainKey, func() android.SourcePath {
-		return java11Home(ctx).Join(ctx, "bin")
-	})
-}
-
 var javaHomeKey = android.NewOnceKey("javaHome")
 
 func javaHome(ctx android.PathContext) android.SourcePath {
@@ -321,12 +297,3 @@
 		return android.PathForSource(ctx, ctx.Config().Getenv("ANDROID_JAVA_HOME"))
 	})
 }
-
-var java11HomeKey = android.NewOnceKey("java11Home")
-
-func java11Home(ctx android.PathContext) android.SourcePath {
-	return ctx.Config().OnceSourcePath(java11HomeKey, func() android.SourcePath {
-		// This is set up and guaranteed by soong_ui
-		return android.PathForSource(ctx, ctx.Config().Getenv("ANDROID_JAVA11_HOME"))
-	})
-}