Removed png16 from autoloaded libs

Author: inclement

pythonforandroid/bootstraps/common/build/src/main/java/org/kivy/android/PythonUtil.java

@@ -37,7 +37,6 @@ protected static ArrayList<String> getLibraries(File libsDir) {
         addLibraryIfExists(libsList, "ffi", libsDir);
         addLibraryIfExists(libsList, "ssl.*", libsDir);
         addLibraryIfExists(libsList, "crypto.*", libsDir);
-        addLibraryIfExists(libsList, "png16", libsDir);
         libsList.add("python2.7");
         libsList.add("python3.5m");
         libsList.add("python3.6m");