Fix Elixir warning and Go cache warnings

- Elixir: Remove unused module attributes @passed/@failed
- Go: Add cache: false to all setup-go actions (no go.sum file)

.github/workflows/inception-matrix.yml

@@ -49,6 +49,7 @@ jobs:
       - uses: actions/setup-go@v5
         with:
           go-version: '1.22'
+          cache: false
       - name: Run Go unit tests
         run: go run tests/unit/test_go.go
 
@@ -334,6 +335,7 @@ jobs:
       - uses: actions/setup-go@v5
         with:
           go-version: '1.22'
+          cache: false
       - name: Run Go tests
         run: go run tests/test_un_go.go
       - name: Integration test
@@ -824,6 +826,7 @@ jobs:
       - uses: actions/setup-go@v5
         with:
           go-version: '1.22'
+          cache: false
 
       - name: Build un.go as inception runner
         run: go build -o un un.go

tests/unit/test_elixir.exs

@@ -2,9 +2,6 @@
 # Unit tests for un.ex - tests internal functions without API calls
 
 defmodule UnTest do
-  @passed Agent.start_link(fn -> 0 end, name: :passed)
-  @failed Agent.start_link(fn -> 0 end, name: :failed)
-
   def run do
     Agent.start_link(fn -> 0 end, name: :passed)
     Agent.start_link(fn -> 0 end, name: :failed)