cmd/compile/internal/gc: remove duplicated TestFP

TestFp and TestFP are same, remove one.

Change-Id: Iffdece634cd4572421974496298925e7c6ac13a9
Reviewed-on: https://go-review.googlesource.com/22799Reviewed-by: Minux Ma <minux@golang.org>
Run-TryBot: Minux Ma <minux@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

src/cmd/compile/internal/gc/ssa_test.go

@@ -71,8 +71,6 @@ func TestCompound(t *testing.T) { runTest(t, "compound_ssa.go") }
 
 func TestCtl(t *testing.T) { runTest(t, "ctl_ssa.go") }
 
-func TestFp(t *testing.T) { runTest(t, "fp_ssa.go") }
-
 func TestLoadStore(t *testing.T) { runTest(t, "loadstore_ssa.go") }
 
 func TestMap(t *testing.T) { runTest(t, "map_ssa.go") }