Remove debug printf.

(assuming it's a leftover - it's getting printed on every build.)

Test: presubmits
Change-Id: I5b098df4c00c241b00143e4e1bdfa0f27a3489c6
diff --git a/java/base.go b/java/base.go
index afb626a..6779283 100644
--- a/java/base.go
+++ b/java/base.go
@@ -1090,9 +1090,6 @@
 		srcJars = append(srcJars, aaptSrcJar)
 	}
 	srcJars = append(srcJars, j.properties.Generated_srcjars...)
-	if len(j.properties.Generated_srcjars) > 0 {
-		fmt.Printf("Java module %s Generated_srcjars: %v\n", ctx.ModuleName(), j.properties.Generated_srcjars)
-	}
 	srcFiles = srcFiles.FilterOutByExt(".srcjar")
 
 	if j.properties.Jarjar_rules != nil {