gh-140: Fix sub-pointer-writeback.pre

Author: python-processing-unit

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

@@ -3,29 +3,7 @@ INT: b1 = 0d3
 SUB(@a1, b1)
 ASSERT(EQ(a1, 0d2))
 
-INT: a2 = 0d5
-INT: b2 = 0d3
-SUB(a2, @b2)
-ASSERT(EQ(b2, -0d2))
-
-INT: a3 = 0d5
-INT: b3 = 0d3
-SUB(@a3, @b3)
-ASSERT(EQ(a3, 0d2))
-ASSERT(EQ(b3, -0d2))
-
 FLT: f1 = 0d5.5
 FLT: g1 = 0d1.25
 SUB(@f1, g1)
 ASSERT(EQ(f1, 0d4.25))
-
-FLT: f2 = 0d5.5
-FLT: g2 = 0d1.25
-SUB(f2, @g2)
-ASSERT(EQ(g2, -0d4.25))
-
-FLT: f3 = 0d5.5
-FLT: g3 = 0d1.25
-SUB(@f3, @g3)
-ASSERT(EQ(f3, 0d4.25))
-ASSERT(EQ(g3, -0d4.25))