Deprecate SQL metricDB

.. removes across the code base

.. need to fixup RideFileCache and Lucene refresh
   within the RideItem/RideCache framework, they will
   NOT be refreshed at present

.. need to look at how charts get refreshed on data
   changes now RideItem provides a more granular
   mechanism (look for XXXREFRESH in code)

.. New Intervals code will definitely NOT compile
   and needs to be redesigned/reimplemented to fit
   in with the ride cache

src/RideFile.cpp

@@ -24,9 +24,10 @@
 #include "DataProcessor.h"
 #include "RideEditor.h"
 #include "RideMetadata.h"
-#include "MetricAggregator.h"
 #include "Settings.h"
+#include "Colors.h"
 #include "Units.h"
+
 #include <QtXml/QtXml>
 #include <algorithm> // for std::lower_bound
 #include <assert.h>