Remove fillExecObjectImpl method

Signed-off-by: Bartosz Dunajski <bartosz.dunajski@intel.com>

Author: BartoszDunajski

shared/source/os_interface/linux/drm_buffer_object.h

@@ -161,7 +161,6 @@ class BufferObject {
 
     uint32_t getOsContextId(OsContext *osContext);
     MOCKABLE_VIRTUAL void fillExecObject(drm_i915_gem_exec_object2 &execObject, OsContext *osContext, uint32_t vmHandleId, uint32_t drmContextId);
-    void fillExecObjectImpl(drm_i915_gem_exec_object2 &execObject, OsContext *osContext, uint32_t vmHandleId);
     void printBOBindingResult(OsContext *osContext, uint32_t vmHandleId, bool bind, int retVal);
 
     void *lockedAddress; // CPU side virtual address