Remove further outdated "settings" code and also implement a few missing things.

llvm-svn: 162376
diff --git a/lldb/source/Interpreter/OptionValueFileSpec.cpp b/lldb/source/Interpreter/OptionValueFileSpec.cpp
index 20b0b04..3a1f26d 100644
--- a/lldb/source/Interpreter/OptionValueFileSpec.cpp
+++ b/lldb/source/Interpreter/OptionValueFileSpec.cpp
@@ -113,4 +113,12 @@
 
 
 
+const lldb::DataBufferSP &
+OptionValueFileSpec::GetFileContents()
+{
+    if (!m_data_sp && m_current_value)
+        m_data_sp = m_current_value.ReadFileContents();
+    return m_data_sp;
+}
+