[lldb/Scripting] Simplify code by removing the #if.

The "none" script interpreter does not depend on Python so it doesn't
make sense to have it withing the if-block. The only goal seems to be to
have a slightly different error for when there's no script interpreter,
but as per the comment this doesn't make sense for more than one
scripting language. I think the existing error is perfectly clear, so I
just removed this altogether.

lldb/source/Interpreter/CommandObjectScript.cpp

@@ -32,7 +32,6 @@ CommandObjectScript::~CommandObjectScript() {}
 
 bool CommandObjectScript::DoExecute(llvm::StringRef command,
                                     CommandReturnObject &result) {
-#if LLDB_ENABLE_PYTHON
   if (m_interpreter.GetDebugger().GetScriptLanguage() ==
       lldb::eScriptLanguageNone) {
     result.AppendError(
@@ -49,9 +48,9 @@ bool CommandObjectScript::DoExecute(llvm::StringRef command,
     return false;
   }
 
-  DataVisualization::ForceUpdate(); // script might change Python code we use
-                                    // for formatting.. make sure we keep up to
-                                    // date with it
+  // Script might change Python code we use for formatting. Make sure we keep
+  // up to date with it.
+  DataVisualization::ForceUpdate();
 
   if (command.empty()) {
     script_interpreter->ExecuteInterpreterLoop();
@@ -66,11 +65,4 @@ bool CommandObjectScript::DoExecute(llvm::StringRef command,
     result.SetStatus(eReturnStatusFailed);
 
   return result.Succeeded();
-#else
-  // if we ever support languages other than Python this simple #ifdef won't
-  // work
-  result.AppendError("your copy of LLDB does not support scripting.");
-  result.SetStatus(eReturnStatusFailed);
-  return false;
-#endif
 }