chore: enable unparam linter (argoproj#677)

Signed-off-by: Matthieu MOREL <matthieu.morel35@gmail.com>

Author: mmorel-35

.golangci.yaml

@@ -25,7 +25,7 @@ linters:
     - staticcheck
     - testifylint
     - thelper
-#    - unparam
+    - unparam
     - unused
     - usestdlibvars
     - whitespace