MongoCollection.dropIndex

void dropIndex(string name, DropIndexOptions options = DropIndexOptions.init) @safe

Drops a single index from the collection by the index name.

Throws

Exception if it is attempted to pass in `*`.

Use dropIndexes() to remove all indexes instead.

void dropIndex(T)(T keys,
		 IndexOptions indexOptions =  IndexOptions.init,
		 DropIndexOptions options =  DropIndexOptions.init) if (!is(Unqual!T ==  IndexModel))

@safe

ditto

void dropIndex(const  IndexModel keys,
		 DropIndexOptions options =  DropIndexOptions.init)

@safe

ditto