Remove DDK support files. (#333)

Deleted DDK build scripts, support files and documentation for it,
as it wasn't working of-the-box with recent tool-sets from MS anyway.

Still keeping `HIDAPI_USE_DDK` macro in the code,
as it still _can_ be used if the build configuration is setup properly.

Resolves: #49

BUILD.md

@@ -106,19 +106,5 @@ To build HIDAPI using MinGW or Cygwin using Autotools, use a general Autotools
 
 Any windows builds (MSVC or MinGW/Cygwin) are also supported by [CMake](BUILD.cmake.md).
 
-HIDAPI can also be built using the Windows DDK (now also called the Windows
-Driver Kit or WDK). This method was originally required for the HIDAPI build
-but not anymore. However, some users still prefer this method. It is not as
-well supported anymore but should still work. Patches are welcome if it does
-not. To build using the DDK:
-
-   1. Install the Windows Driver Kit (WDK) from Microsoft.
-   2. From the Start menu, in the Windows Driver Kits folder, select Build
-      Environments, then your operating system, then the x86 Free Build
-      Environment (or one that is appropriate for your system).
-   3. From the console, change directory to the `windows/ddk_build/` directory,
-      which is part of the HIDAPI distribution.
-   4. Type build.
-   5. You can find the output files (DLL and LIB) in a subdirectory created
-      by the build system which is appropriate for your environment. On
-      Windows XP, this directory is `objfre_wxp_x86/i386`.
+If you are looking for information regarding DDK build of HIDAPI
+- the build has been broken for a while and now the support files are obsolete.

windows/Makefile.am

@@ -8,7 +8,6 @@ hdrdir = $(includedir)/hidapi
 hdr_HEADERS = $(top_srcdir)/hidapi/hidapi.h
 
 EXTRA_DIST = \
-  ddk_build \
   hidapi.vcproj \
   hidtest.vcproj \
   Makefile-manual \

windows/ddk_build/.gitignore

@@ -1,2 +0,0 @@
-*.log
-obj*_*_*

windows/ddk_build/hidapi.def

@@ -1,18 +0,0 @@
-LIBRARY   hidapi
-EXPORTS
-   hid_open    @1
-   hid_write   @2
-   hid_read    @3
-   hid_close   @4
-   hid_get_product_string @5
-   hid_get_manufacturer_string @6
-   hid_get_serial_number_string @7
-   hid_get_indexed_string @8
-   hid_error @9
-   hid_set_nonblocking @10
-   hid_enumerate @11
-   hid_open_path @12
-   hid_send_feature_report @13
-   hid_get_feature_report @14
-   hid_get_input_report @15
-   

windows/ddk_build/makefile

@@ -1,49 +0,0 @@
-#############################################################################
-#
-#               Copyright (C) Microsoft Corporation 1995, 1996
-#       All Rights Reserved.
-#
-#       MAKEFILE for HID directory
-#
-#############################################################################
-
-!IFDEF WIN95_BUILD
-
-ROOT=..\..\..\..
-
-VERSIONLIST = debug retail
-IS_32 = TRUE
-IS_SDK = TRUE
-IS_PRIVATE = TRUE
-IS_SDK = TRUE
-IS_DDK = TRUE
-WIN32 = TRUE
-COMMONMKFILE = hidapi.mk
-
-!include $(ROOT)\dev\master.mk
-
-
-!ELSE
-
-#
-# DO NOT EDIT THIS FILE!!!  Edit .\sources. if you want to add a new source
-# file to this component.  This file merely indirects to the real make file
-# that is shared by all the driver components of the Windows NT DDK
-#
-
-!IF DEFINED(_NT_TARGET_VERSION)
-!	IF $(_NT_TARGET_VERSION)>=0x501
-!		INCLUDE $(NTMAKEENV)\makefile.def
-!	ELSE
-#               Only warn once per directory
-!               INCLUDE $(NTMAKEENV)\makefile.plt
-!               IF "$(BUILD_PASS)"=="PASS1"
-!		    message BUILDMSG: Warning : The sample "$(MAKEDIR)" is not valid for the current OS target.
-!               ENDIF
-!	ENDIF
-!ELSE
-!	INCLUDE $(NTMAKEENV)\makefile.def
-!ENDIF
-
-!ENDIF
-

windows/ddk_build/sources

@@ -1,23 +0,0 @@
-TARGETNAME=hidapi
-TARGETTYPE=DYNLINK
-UMTYPE=console
-UMENTRY=main
-
-MSC_WARNING_LEVEL=/W3 /WX
-
-TARGETLIBS=$(SDK_LIB_PATH)\hid.lib \
-           $(SDK_LIB_PATH)\setupapi.lib \
-           $(SDK_LIB_PATH)\kernel32.lib \
-           $(SDK_LIB_PATH)\comdlg32.lib
-
-USE_MSVCRT=1
-
-INCLUDES= ..\..\hidapi
-SOURCES= ..\hid.c \
-
-
-TARGET_DESTINATION=retail
-
-MUI=0
-MUI_COMMENT="HID Interface DLL"
-