CDRIVER-4521 Remove C89 compatibility macros #1181
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Resolves CDRIVER-4521. Followup to #1138. Verified by this patch.
This is part of a continued effort to establish C99 as the minimum supported C standard:
__STDC_VERSION__is required by implementations as of C95, but may not be present on MSVC without specifying C11 conformance, sodefined(__STDC_VERSION__)must still be used.defined(__STDC_VERSION__)was added prior to use of__STDC_VERSION__inbson-memory.cfor consistency.__STDC_VERSION__ >= 199901Las of C99 (if present), so tests for__STDC_VERSION__ < 199901Lhave been removed.__FUNCTION__inbson-macros.hwas preconditioned on pre-C99 compiler extensions, so it is therefore removed in favor of__func__unless using MSVC.*_MINand*_MAXmacros for integral types were added in C99 in<stdint.h>, so their substitutions inbson-compat.hare now removed.