chore(nix->guix): delete Nix estate-wide (#138)

Author: hyperpolymath

.github/workflows/governance.yml

@@ -14,4 +14,4 @@ permissions:
 
 jobs:
   governance:
-    uses: hyperpolymath/standards/.github/workflows/governance-reusable.yml@7fdc2705df74b4e352d2a1cde3e87a5923fdf329
+    uses: hyperpolymath/standards/.github/workflows/governance-reusable.yml@7fdc2705df74b4e352d2a1cde3e87a5923fdf329

.github/workflows/hypatia-scan.yml

@@ -17,4 +17,4 @@ permissions:
 
 jobs:
   scan:
-    uses: hyperpolymath/standards/.github/workflows/hypatia-scan-reusable.yml@7fdc2705df74b4e352d2a1cde3e87a5923fdf329
+    uses: hyperpolymath/standards/.github/workflows/hypatia-scan-reusable.yml@7fdc2705df74b4e352d2a1cde3e87a5923fdf329