Rm filtering out NA days_above_* after flow data problems have been fixed

[egouldo]

Reminder to remove the following (once flow data updated):

VEFMAP_VEG_Stage6/main.R

Line 180 in bba19dc

filter(!is.na(days_above_springfresh)) #TODO temporary due to incomplete flow data

VEFMAP_VEG_Stage6/main.R

Line 192 in bba19dc

filter(!is.na(days_above_springfresh)) #TODO temporary due to incomplete flow data