ocioutils: remove unused function

We could have kept this, but since I want to reorganize the sliders it might result in confusion in the codebase

app/common/ocioutils.cpp

@@ -44,16 +44,4 @@ OCIO::BitDepth OCIOUtils::GetOCIOBitDepthFromPixelFormat(VideoParams::Format for
   return OCIO::BIT_DEPTH_UNKNOWN;
 }
 
-OCIO::GradingRGBM OCIOUtils::QVec4ToRGBM(const QVector4D &vector)
-{
-    OCIO::GradingRGBM rgbm;
-
-    rgbm.m_red = vector.x();
-    rgbm.m_green = vector.y();
-    rgbm.m_blue = vector.z();
-    rgbm.m_master = vector.w();
-
-    return rgbm;
-}
-
 }

app/common/ocioutils.h

@@ -35,7 +35,6 @@ class OCIOUtils
 public:
   static OCIO::BitDepth GetOCIOBitDepthFromPixelFormat(VideoParams::Format format);
 
-  static OCIO::GradingRGBM QVec4ToRGBM(const QVector4D &vector);
 };
 
 }