closes https://github.com/assimp/assimp/issues/1850: remove buggy setup in cmake.

CMakeLists.txt

@@ -110,7 +110,7 @@ if (WIN32)
 endif()
 
 IF(MSVC)
-  SET (CMAKE_PREFIX_PATH "D:\\libs\\devil")
+#  SET (CMAKE_PREFIX_PATH "D:\\libs\\devil")
   OPTION( ASSIMP_INSTALL_PDB
     "Install MSVC debug files."
     ON