Remove unused writeFile var

Test: TH
Change-Id: I09922d8f837f41dad01bc64192fa174d988eb39a
diff --git a/android/defs.go b/android/defs.go
index a34d302..78cdea2 100644
--- a/android/defs.go
+++ b/android/defs.go
@@ -103,16 +103,6 @@
 			Description: "concatenate files to $out",
 		})
 
-	// ubuntu 14.04 offcially use dash for /bin/sh, and its builtin echo command
-	// doesn't support -e option. Therefore we force to use /bin/bash when writing out
-	// content to file.
-	writeFile = pctx.AndroidStaticRule("writeFile",
-		blueprint.RuleParams{
-			Command:     `rm -f $out && /bin/bash -c 'echo -e -n "$$0" > $out' $content`,
-			Description: "writing file $out",
-		},
-		"content")
-
 	// Used only when USE_GOMA=true is set, to restrict non-goma jobs to the local parallelism value
 	localPool = blueprint.NewBuiltinPool("local_pool")