diff --git a/definitions/mars/grib.rfsd.go.def b/definitions/mars/grib.rfsd.go.def
deleted file mode 100644
index 651444588..000000000
--- a/definitions/mars/grib.rfsd.go.def
+++ /dev/null
@@ -1,14 +0,0 @@
-# rfsd Gridded observations
-
-alias mars.step = endStep;
-
-alias mars.date = dateOfForecast;
-alias mars.time = timeOfForecast;
-
-alias mars.origin = inputOriginatingCentre;
-
-# alias mars.anoffset=anoffset;
-
-# We need this because 'postProcessing' is defined later
-meta efas_model sprintf("%s", postProcessing) : no_copy;
-alias mars.model = efas_model;
diff --git a/definitions/mars/grib.rfsd.sfo.def b/definitions/mars/grib.rfsd.sfo.def
deleted file mode 100644
index 8be729236..000000000
--- a/definitions/mars/grib.rfsd.sfo.def
+++ /dev/null
@@ -1,14 +0,0 @@
-# Simulation forced with observations
-
-alias mars.step = endStep;
-
-alias mars.date = dateOfForecast;
-alias mars.time = timeOfForecast;
-
-alias mars.origin = inputOriginatingCentre;
-
-# alias mars.anoffset=anoffset;
-
-# We need this because 'postProcessing' is defined later
-meta efas_model sprintf("%s", postProcessing) : no_copy;
-alias mars.model = efas_model;