Remove unnecessary warning suppression from libdm.

Fixes: 110035986
Test:  mma -j builds without errors or warnings

Change-Id: Id00f844ad75c3ee2ebb9f47eebc7976bc40bdf59
Signed-off-by: Sandeep Patil <sspatil@google.com>

fs_mgr/libdm/Android.bp

@@ -20,10 +20,6 @@ cc_library_static {
     recovery_available: true,
 
     export_include_dirs: ["include"],
-    cflags: [
-        // TODO(b/110035986): Allows us to create a skeleton of required classes
-        "-Wno-unused-private-field",
-    ],
 
     srcs: [
         "dm_table.cpp",