Remove Java language constraints

These are no longer going to be used for Java language versions
configuration, see:
https://docs.google.com/document/d/13yXhOQeMZQmlW3obyZ7fJP3sm3eVLbK3Nuk2LZjcZiU/edit#heading=h.5mcn15i0e1ch

PiperOrigin-RevId: 364390842
Change-Id: I63bc26a082e5f3d58c7dae3bf3ab833b6acde1f2
diff --git a/java/constraints/BUILD b/java/constraints/BUILD
index 5946f95..61bfd23 100644
--- a/java/constraints/BUILD
+++ b/java/constraints/BUILD
@@ -35,39 +35,3 @@
     name = "jdk12",
     constraint_setting = ":runtime",
 )
-
-constraint_setting(
-    name = "language",
-    visibility = ["//visibility:private"],
-)
-
-# visibility
-constraint_value(
-    name = "java7",
-    constraint_setting = ":language",
-)
-
-constraint_value(
-    name = "java8",
-    constraint_setting = ":language",
-)
-
-constraint_value(
-    name = "java9",
-    constraint_setting = ":language",
-)
-
-constraint_value(
-    name = "java10",
-    constraint_setting = ":language",
-)
-
-constraint_value(
-    name = "java11",
-    constraint_setting = ":language",
-)
-
-constraint_value(
-    name = "java12",
-    constraint_setting = ":language",
-)