HERE SQL clean-up

[radumas]

• bdit_data-sources/here/traffic/sql/create_tables.sql

  Lines 20 to 21 in 456b7c0

  	GRANT SELECT ON TABLE here_staging.ta TO bdit_humans;
  	GRANT INSERT, UPDATE, SELECT, TRIGGER ON TABLE here_staging.ta TO here_bot;

  
  should be here.ta

• bdit_data-sources/here/traffic/sql/create_tables.sql

  Line 42 in 456b7c0

  GRANT INSERT, UPDATE, SELECT, TRIGGER ON TABLE here_staging.ta TO here_bot;

  
  should be here.ta_view
• Delete https://github.com/CityofToronto/bdit_data-sources/blob/master/here/traffic/sql/function_generate_monthly_tti.sql