chore: drop disabled husky pre-push hook and dependency

The .husky/_pre-push script was renamed from pre-push, which
disables it under husky v9. With no remaining active hooks, husky
is dead weight, so remove the dependency and prepare script too.

pnpm-lock.yaml

@@ -204,9 +204,6 @@ importers:
       esno:
         specifier: ^4.8.0
         version: 4.8.0
-      husky:
-        specifier: ^9.1.7
-        version: 9.1.7
       oxfmt:
         specifier: ^0.42.0
         version: 0.42.0
@@ -4052,11 +4049,6 @@ packages:
     resolution: {integrity: sha512-nZXjEF2nbo7lIw3mgYjItAfgQXog3OjJogSbKa2CQIIvSGWcKgeJnQlNXip6NglNzYH45nSRiEVimMvYL8DDqQ==}
     engines: {node: '>=14.18.0'}
 
-  husky@9.1.7:
-    resolution: {integrity: sha512-5gs5ytaNjBrh5Ow3zrvdUUY+0VxIuWVL4i9irt6friV+BqdCfmV11CQTWMiBYWHbXhco+J1kHfTOUkePhCDvMA==}
-    engines: {node: '>=18'}
-    hasBin: true
-
   ico-endec@0.1.6:
     resolution: {integrity: sha512-ZdLU38ZoED3g1j3iEyzcQj+wAkY2xfWNkymszfJPoxucIUhK7NayQ+/C4Kv0nDFMIsbtbEHldv3V8PU494/ueQ==}
 
@@ -10762,8 +10754,6 @@ snapshots:
 
   human-signals@4.3.1: {}
 
-  husky@9.1.7: {}
-
   ico-endec@0.1.6: {}
 
   iconv-lite@0.4.24: