Get rid of buck build warnings for no tests and no checkstyle files

Change-Id: I1f4f38cc1069351c4e066ce313321e5c0ceed843

@@ -46,8 +46,6 @@ def checkstyle(
                 test_rule_timeout_ms = 20000,
                 labels = [ 'checkstyle' ],
         )
-    else:
-        print 'Not generating checkstyle rule for %s because there are no sources.' % name
 
 def java_doc(
     name,
@@ -255,9 +253,6 @@ def osgi_jar_with_tests(
   if test_srcs is None:
       test_srcs = glob([TEST + '/*.java'])
 
-  if not test_srcs:
-          print "Generating test rule for %s, but there are no tests." % name
-
   java_test(
     name = name + '-tests',
     srcs = test_srcs,