evmdis: remove empty go vendor hash

pkgs/development/tools/analysis/evmdis/default.nix

···
     hash = "sha256-jfbjXoGT8RtwLlqX13kcKdiFlhrVwA7Ems6abGJVRbA=";
   };
 
-  vendorHash = "sha256-pQpattmS9VmO3ZIQUFn66az8GSmB4IvYhTTCFn6SUmo=";
+  vendorHash = null;
 
   preBuild = ''
     # Add go modules support