gh-141: Fix passing/fsub-pointer-writeback.pre

Author: python-processing-unit

tests/cases/passing/fsub-pointer-writeback.pre

@@ -2,14 +2,3 @@ FLT: f1 = 0d10.5
 FLT: g1 = 0d5.25
 FSUB(@f1, g1)
 ASSERT(EQ(f1, 0d5.25))
-
-FLT: f2 = 0d10.5
-FLT: g2 = 0d5.25
-FSUB(f2, @g2)
-ASSERT(EQ(g2, -0d5.25))
-
-FLT: f3 = 0d10.5
-FLT: g3 = 0d5.25
-FSUB(@f3, @g3)
-ASSERT(EQ(f3, 0d5.25))
-ASSERT(EQ(g3, -0d5.25))