all: enable unparam

It used to fail on generics, but now seems to work.

Change-Id: Id14de2f172fbee5e710cf3c72d7c6e6b81bbeb23
Reviewed-on: https://go-review.googlesource.com/c/pkgsite-metrics/+/477355
Run-TryBot: Zvonimir Pavlinovic <zpavlinovic@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Jonathan Amsterdam <jba@google.com>
diff --git a/checks.bash b/checks.bash
index 5875972..45cde6a 100755
--- a/checks.bash
+++ b/checks.bash
@@ -63,10 +63,8 @@
 
 # check_unparam runs unparam on source files.
 check_unparam() {
-  if [[ $(go version) = *go1.17* ]]; then
     ensure_go_binary mvdan.cc/unparam
     runcmd unparam ./...
-  fi
 }
 
 # check_vet runs go vet on source files.