Delete obsolete README.Win9X_NT_embedding

doc/README.Win9X_NT_embedding

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-Issue: 
-======
- Embedded systems need to run engine on Windows 98/ME or Windows NT 4.0 hosts. 
- CRT dependency is also not a good thing for such systems.
-
-Rationale:
-==========
-
- Although these systems are out of support by Microsoft we found that as of 2009
- - NT4 and its specialized derivatives remain the platform of choice for 
-   closed-circuit environments
- - Win98 is still being used as a platform for secure fund transfer systems
-   (that is, sealed appliances using dial-up to transfer financial data)
-
- We assume the situation will continue for the foreseeable future.
-
-Document author:
-=================
- Nikolay Samofatov (skidder at users.sourceforge.net)
-
-Solution:
-=========
- MSVC7 build of Firebird 2.5 produces statically linked binaries that can work
- on Windows 98SE, Windows ME and Windows NT 4.0 SP3+ systems as well as the 
- newer platforms all the way to Windows 7.
-
-Known issues:
-=============
- You need Comctl32.dll version 5.8 or later installed for Guardian and server
- running as application to display property pages. This library is distributed
- with Internet Explorer 5.