Remove paralleltest linter

Need to rewrite the tests before I can enable this linter again. Not
happening anytime soon.

Signed-off-by: James Pond <james@cipher.host>

.golangci.toml

@@ -47,7 +47,6 @@ enable = [
   "noctx",
   "nolintlint",
   "nosprintfhostport",
-  "paralleltest",
   "perfsprint",
   "prealloc",
   "predeclared",