CDRIVER-2460 fix BSON_STATIC_ASSERT definition

The macro definition was mistakenly changed in 1.9.0 (CDRIVER-2271) and partly
reverted (CDRIVER-2450). This change completely reverts the macro to its 1.8.0
definition.

Signed-off-by: Petr Písař <[email protected]>

Author: ppisar

src/bson/bson-macros.h

@@ -201,7 +201,7 @@
    } while (0)
 
 /* obsolete macros, preserved for compatibility */
-#define BSON_STATIC_ASSERT(s) BSON_STATIC_ASSERT_ (s, __LINE__, assert)
+#define BSON_STATIC_ASSERT(s) BSON_STATIC_ASSERT_ (s, __LINE__)
 #define BSON_STATIC_ASSERT_JOIN(a, b) BSON_STATIC_ASSERT_JOIN2 (a, b)
 #define BSON_STATIC_ASSERT_JOIN2(a, b) a##b
 #define BSON_STATIC_ASSERT_(s, l)                             \