Revert "Added Windows-specific defitions taken from the Solution files"

This reverts commit c2c278b813dd5b2c5646979c831f129972240a2c.

This makes the build behave worst than default, therefore reverting for
now.
Signed-off-by: Otavio Rodolfo Piske <opiske@redhat.com>

CMakeLists.txt

@@ -36,9 +36,6 @@ IF(CMAKE_SYSTEM_NAME MATCHES "Linux")
     	SET(PAHO_LIBRARY_DIR_NAME "lib64")
     ENDIF()
   ENDIF()
-ELSEIF (CMAKE_SYSTEM_NAME MATCHES "Windows")
-  # Both were taken from the VS solution files
-  ADD_DEFINITIONS(-DWIN32_LEAN_AND_MEAN -D_WINDOWS )
 ENDIF()
 
 ## build options