Remove java version checks

The build now uses a prebuilt javac binary distributed with the
source, checking the host java version is no longer required.

Test: m -j checkbuild
Bug: 62956999
Change-Id: Ieef83481d0e6d68371bbd8a422f870ffe2bbb428

ui/build/Android.bp

@@ -27,7 +27,6 @@ bootstrap_go_package {
         "context.go",
         "environment.go",
         "exec.go",
-        "java.go",
         "kati.go",
         "make.go",
         "ninja.go",