Drop influxdb

This was only required for:
- aodh which is phased out - https://review.openstack.org/#/c/311989/
- monasca which is not subject to g-r

Change-Id: Ic2d022db5ffe23f3ca15f5524682a3bce6ba3e2a

global-requirements.txt

@@ -61,7 +61,6 @@ GitPython>=1.0.1 # BSD License (3 clause)
 happybase>=0.5,!=0.7;python_version=='2.7'  # MIT
 heat-translator>=0.4.0 # Apache-2.0
 httplib2>=0.7.5  # MIT
-influxdb>=2.2.0                       # MIT License
 ironic-lib>=1.3.0  # Apache-2.0
 ironic-discoverd>=1.0.0                # Apache-2.0
 ipaddress>=1.0.7;python_version<'3.3'  # PSF

upper-constraints.txt

@@ -146,7 +146,6 @@ heat-translator===0.4.0
 hgtools===6.5.1
 httplib2===0.9.2
 idna===2.1
-influxdb===2.12.0
 ipaddress===1.0.16;python_version=='2.7'
 ironic-discoverd===1.1.1
 ironic-lib===1.3.0