[lldb][NFC] Remove an outdated comment in HostInfoBase

We should *never* use static local variables in this file as this makes
unittesting the plugin code impossible (and this whole 'testing' thing has
turned out to be rather useful so far).

lldb/source/Host/common/HostInfoBase.cpp

@@ -31,12 +31,7 @@ using namespace lldb;
 using namespace lldb_private;
 
 namespace {
-// The HostInfoBaseFields is a work around for windows not supporting static
-// variables correctly in a thread safe way. Really each of the variables in
-// HostInfoBaseFields should live in the functions in which they are used and
-// each one should be static, but the work around is in place to avoid this
-// restriction. Ick.
-
+/// Contains the state of the HostInfoBase plugin.
 struct HostInfoBaseFields {
   ~HostInfoBaseFields() {
     if (FileSystem::Instance().Exists(m_lldb_process_tmp_dir)) {