Refactoring

app/src/main/java/eu/faircode/email/Helper.java

@@ -621,15 +621,4 @@ public class Helper {
         bundle.writeToParcel(p, 0);
         return p.dataSize();
     }
-
-    static long getFreeMem() {
-        Runtime rt = Runtime.getRuntime();
-        long used = (rt.totalMemory() - rt.freeMemory());
-        long max = rt.maxMemory();
-        return (max - used);
-    }
-
-    static int getFreeMemMb() {
-        return (int) (getFreeMem() / 1024L / 1024L);
-    }
 }