Remove array namespace check (#988)

For runtimeverification/k#3976

There's a special case for a hook namespace in `ARRAY` which falls back
to K semantics for those symbols. The frontend wont emit any hook
attributes in that namespace for the ARRAY module anyway so it can
safely be removed.

lib/ast/AST.cpp

@@ -218,9 +218,6 @@ ValueType KORECompositeSort::getCategory(std::string const &hookName) {
     category = SortCategory::MInt;
     bits = std::stoi(hookName.substr(10));
   } else {
-    // ARRAY.Array is implemented in K and therefore should fall through to the
-    // default category. Should it one day be implemented as a fully hooked
-    // sort, a check needs to be added to the list above.
     category = SortCategory::Symbol;
   }
   return {category, bits};

lib/codegen/CreateTerm.cpp

@@ -648,15 +648,8 @@ llvm::Value *CreateTerm::createHook(
     assert(false && "not implemented yet: MInt");
     abort();
   }
-  std::string domain = name.substr(0, name.find('.'));
-  if (domain == "ARRAY") {
-    // array is not really hooked in llvm, it's implemented in K
-    auto fn_name = fmt::format(
-        "eval_{}", ast_to_string(*pattern->getConstructor(), 0, false));
-    return createFunctionCall(fn_name, pattern, false, true, locationStack);
-  }
-  std::string hookName
-      = "hook_" + domain + "_" + name.substr(name.find('.') + 1);
+  std::string hookName = "hook_" + name.substr(0, name.find('.')) + "_"
+                         + name.substr(name.find('.') + 1);
   return createFunctionCall(hookName, pattern, true, false, locationStack);
 }