Revert "[CDRIVER-2396] Set default values for mongoc-config.h. Simplify if checking and setting default values for mongoc-config.h"
Revert "[CDRIVER-2396] Set default values for mongoc-config.h. Simplify if checking and setting default values for mongoc-config.h"

This reverts commit f81e63d

derickr/mongo-c-driver,acmorrow/mongo-c-driver,acmorrow/mongo-c-driver,ajdavis/mongo-c-driver,remicollet/mongo-c-driver,mongodb/mongo-c-driver,derickr/mongo-c-driver,jmikola/mongo-c-driver,rcsanchez97/mongo-c-driver,acmorrow/mongo-c-driver,remicollet/mongo-c-driver,remicollet/mongo-c-driver,mongodb/mongo-c-driver,acmorrow/mongo-c-driver,jmikola/mongo-c-driver,jmikola/mongo-c-driver,mongodb/mongo-c-driver,remicollet/mongo-c-driver,ajdavis/mongo-c-driver,mongodb/mongo-c-driver,mongodb/mongo-c-driver,derickr/mongo-c-driver,beingmeta/mongo-c-driver,remicollet/mongo-c-driver,beingmeta/mongo-c-driver,beingmeta/mongo-c-driver,rcsanchez97/mongo-c-driver,jmikola/mongo-c-driver,rcsanchez97/mongo-c-driver,remicollet/mongo-c-driver,beingmeta/mongo-c-driver,jmikola/mongo-c-driver,derickr/mongo-c-driver,derickr/mongo-c-driver,rcsanchez97/mongo-c-driver,jmikola/mongo-c-driver,rcsanchez97/mongo-c-driver,beingmeta/mongo-c-driver,jmikola/mongo-c-driver,acmorrow/mongo-c-driver,ajdavis/mongo-c-driver,beingmeta/mongo-c-driver,derickr/mongo-c-driver,acmorrow/mongo-c-driver,acmorrow/mongo-c-driver,ajdavis/mongo-c-driver,beingmeta/mongo-c-driver,rcsanchez97/mongo-c-driver,derickr/mongo-c-driver,rcsanchez97/mongo-c-driver,ajdavis/mongo-c-driver,mongodb/mongo-c-driver,ajdavis/mongo-c-driver,remicollet/mongo-c-driver,ajdavis/mongo-c-driver,mongodb/mongo-c-driver,beingmeta/mongo-c-driver