Clean project structure.

src/audio/midi/MidiEvent.cpp

@@ -1,37 +0,0 @@
-#include "MidiEvent.h"
-
-MidiEvent::MidiEvent()
-    : mTimeDelta(0)
-{
-
-}
-
-std::unique_ptr<MidiEvent> MidiEvent::Create()
-{
-    return std::make_unique<MidiEvent>();
-}
-
-void MidiEvent::SetTimeDelta(int delta)
-{
-    mTimeDelta = delta;
-}
-
-bool MidiEvent::IsMetaEvent(char c)
-{
-    return (c & META_EVENT) == META_EVENT;
-}
-
-bool MidiEvent::IsSysExEvent(char c)
-{
-    return IsNormalSysExEvent(c) || IsDividedSysExEvent(c);
-}
-
-bool MidiEvent::IsNormalSysExEvent(char c)
-{
-    return (c & SYSEX_EVENT) == SYSEX_EVENT;
-}
-
-bool MidiEvent::IsDividedSysExEvent(char c)
-{
-    return (c & DIVIDED_SYSEX_EVENT) == DIVIDED_SYSEX_EVENT;
-}