spotlight finds "anaconda-navigator" but `conda` has been uninstalled
Go to Finder → Applications and find Anaconda-Navigator.app. It should be an alias.  Right click on it and click on "Show original" .

For proper uninstall


  Anaconda-Clean must be run before simple remove.
   Install the
  Anaconda-Clean package from Anaconda Prompt (terminal on Linux or
  macOS):
  
  conda install anaconda-clean. 
  
  In the same window, run one of these commands:
  
  Remove all Anaconda-related files and directories with a confirmation
  prompt before deleting each one:
  
  anaconda-clean
  
  Or, remove all Anaconda-related files and directories
  without being prompted to delete each one:
  
  anaconda-clean --yes
  
  Anaconda-Clean creates a backup of all files and
  directories that might be removed in a folder named .anaconda_backup
  in your home directory. Also note that Anaconda-Clean leaves your data
  files in the AnacondaProjects directory untouched. After using
  Anaconda-Clean


delete the folder where the installation previously was. It should be named anaconda3 or anaconda2 etc.,

https://docs.anaconda.com/anaconda/install/uninstall/

But since you don't have conda, seen by "command not found" deleting the remnant files can be done using apps like EasyFind.