Remove annotation_processors property

Now that there are no uses left of annotation_processors remove
the property.

If there are no annotation processor classes for javac for a module,
due to an empty "plugins" property or using kapt for annotation
processors, pass -proc:none to javac to ensure it does not try
to run any annotation processors found in the classpath.

Bug: 77284273
Test: plugin_test.go, kotlin_test.go
Change-Id: I3823d9fec8d3d07d2e49b1d97839f7fcbdd35647
diff --git a/java/kotlin_test.go b/java/kotlin_test.go
index 9406ef9..e0eb0c0 100644
--- a/java/kotlin_test.go
+++ b/java/kotlin_test.go
@@ -149,9 +149,8 @@
 	if javac.Args["processorPath"] != "" {
 		t.Errorf("expected processorPath '', got %q", javac.Args["processorPath"])
 	}
-	// TODO(b/77284273): test for -processor:none
-	if javac.Args["processor"] != "" {
-		t.Errorf("expected processor '', got %q", javac.Args["processor"])
+	if javac.Args["processor"] != "-proc:none" {
+		t.Errorf("expected processor '-proc:none', got %q", javac.Args["processor"])
 	}
 }