Remove APIs marked for removal

[offa]

Marked for removal in v0.8.0:

Methods

• InfluxDB::flushBuffer() — Remove deprecated InfluxDB::flushBuffer() and InfluxDBException ctor #249
• Point::toLineProtocol() — Remove deprecated Point APIs marked for removal #228
• Point::getCurrentTimestamp() — Remove deprecated Point APIs marked for removal #228
• InfluxDBException::InfluxDBException(const std::string&, const std::string&) — Remove deprecated InfluxDB::flushBuffer() and InfluxDBException ctor #249

Types

• NonExistentDatabase — Remove deprecated exception classes marked for removal #302
• BadRequest — Remove deprecated exception classes marked for removal #302
• ServerError — Remove deprecated exception classes marked for removal #302
• ConnectionError — Remove deprecated exception classes marked for removal #302

Disabling deprecation warnings for unit tests might become unnecessary.