diff --git a/fixtures/wrong_error_line.rl b/fixtures/wrong_error_line.rl
deleted file mode 100644
index ae47f5d..0000000
--- a/fixtures/wrong_error_line.rl
+++ /dev/null
@@ -1,57 +0,0 @@
-def isMatrix(m)
-  if (m.type() != "ARRAY")
-    //raise(1, "unexpected type, got=" + m.type() + " want=ARRAY")
-    return false
-  end
-
-  itemTypes = []
-  foreach idx, item in m
-    itemTypes = itemTypes + item.type()
-  end
-  if (itemTypes.uniq().size() > 1)
-    //raise(1, "unconsistent item types, got=" + itemTypes.to_json() + " want=ARRAY")
-    return false
-  end
-
-  itemSizes = []
-  foreach idx, item in m
-    itemSizes = itemSizes + item.size()
-  end
-  if (itemSizes.uniq().size() > 1 )
-    //raise(1, "unconsistent item sizes: " + itemSizes.to_json())
-    return false
-  end
-
-  subItemTypes = []
-  foreach rIdx, row in m
-    foreach cIdx, col in row 
-      subItemTypes = subItemTypes + col.type()
-    end
-  end
-  if ((subItemTypes.uniq().size() > 1) || (subItemTypes.uniq().first().type() != "INTEGER") || (subItemTypes.uniq().first().type() != "FLOAT"))
-    //raise(1, "unconsistent subitem types, got=" + subItemTypes.to_json() + " want=INTEGER|FLOAT")
-    return false
-  end
-
-  return true
-end
-
-def dim(m)
-  return [m.size(), m.first().size()]
-end
-
-def mul(a, b)
-  // Check whether both arguments are matrices
-  if (!isMatrix(a))
-    raise(1, "first argument needs to be a valid matrix")
-  end
-  if (!isMatrix(b))
-    raise(1, "first argument needs to be a valid matrix")
-  end
-
-  aDim, bDim = dim(a), dim(b)
-
-  puts(aDim, bDim)
-end
-
-mul([[1,2],[3,4]], [[4,3],[2,1]])