Remove AndroidMkExtraFootersFunc entries param.

I added in case anyone needs to access AndroidMkEntries to generate
footer lines, but nobody uses it, and it only confuses people.

Test: m nothing, TreeHugger
Change-Id: Ic8a450e3c306d9228c1fdec212c7441bd6aaee03
diff --git a/android/androidmk.go b/android/androidmk.go
index 42c5d00..b32048a 100644
--- a/android/androidmk.go
+++ b/android/androidmk.go
@@ -141,7 +141,7 @@
 }
 
 type AndroidMkExtraEntriesFunc func(entries *AndroidMkEntries)
-type AndroidMkExtraFootersFunc func(w io.Writer, name, prefix, moduleDir string, entries *AndroidMkEntries)
+type AndroidMkExtraFootersFunc func(w io.Writer, name, prefix, moduleDir string)
 
 // Utility funcs to manipulate Android.mk variable entries.
 
@@ -554,7 +554,7 @@
 	fmt.Fprintln(&a.footer, "include "+a.Include)
 	blueprintDir := filepath.Dir(bpPath)
 	for _, footerFunc := range a.ExtraFooters {
-		footerFunc(&a.footer, name, prefix, blueprintDir, a)
+		footerFunc(&a.footer, name, prefix, blueprintDir)
 	}
 }