Revert "Add class DnsPermission"

This reverts commit c3d818e1ba934268f5603d6773d3eda2380929e3.

The class is already part of the System assembly.  I mistook the
namespace as the Assembly name.
Put runtime-invoke wrappers of valuetype methods into a separate cache, they have a different signature.
Add support for constrained gsharedvt calls to IComparable<T>.CompareTo ()/IEquatable<T>.Equals (). Fixes #13704.
Fix cross compilation to windows. "Windows.h" should be "windows.h". Fixes #13729.
Fix bug #13485: retrieve private fields and properties in serialization.
Merge pull request #723 from alesliehughes/master

Revert "Add class DnsPermission"
Don't show internal error when default paramater expression cannot be converted to paramter type. Fixes #13682
Fix log messge.
monotouch requires DISABLE_COM too.
[sgen]Add some comments on the usage of all STW related fields.
[sgen]GC fight club rules. NEVER poke the managed heap if you are not supposed to.
Fix thinko in last commit. It's DISABLE_COM and not DISABLE_REMOTING.
implement character validation methods in XmlConvert. Fix bug #11910.
[sdb] Improve logging a bit.
[llvm] Avoid adding methods which failed llvm compilation to 'mono.function_indexes'.
[llvm] Disable LLVM for async methods to work around #13734.
[System.Core/Android] Support Android v4.3's timezone DB format

Fixes: https://bugzilla.xamarin.com/show_bug.cgi?id=13686

Android v4.3 changed the timezone DB format described in 8a263984 and
replaced it with a single file containing version, index, data, and a
"zoneTab" (which is parsed but unused).

Port/rewrite the Java libcore.util.ZoneInfoDB type into
System.AndroidTzData so that this new file format is supported.

(Another day, another file format...)
Fix a mixed-decls-and-code warning.
Fix a warning in dlmalloc by #if 0'ing an unused function.
Fix some warnings in strtod by #if 0'ing some unused functions.