testsuite: delete slp scan from loop vect test.

I accidentally left in an slp1 check in the vect test which showed up as
UNRESOLVED and had missed it in the sum file.  This deletes that line.

gcc/testsuite/ChangeLog:

	PR testsuite/105196
	* gcc.dg/vect/complex/fast-math-complex-add-pattern-float.c: Remove slp1 check.

gcc/testsuite/gcc.dg/vect/complex/fast-math-complex-add-pattern-float.c

@@ -9,5 +9,4 @@
 /* { dg-final { scan-tree-dump-times "stmt.*COMPLEX_ADD_ROT90" 1 "vect" { target { vect_complex_add_float } } } } */
 /* { dg-final { scan-tree-dump-times "stmt.*COMPLEX_ADD_ROT270" 1 "vect" { target { vect_complex_add_float } } } } */
 /* { dg-final { scan-tree-dump "Found COMPLEX_ADD_ROT270" "vect" } } */
-/* { dg-final { scan-tree-dump "Found COMPLEX_ADD_ROT90" "slp1" } } */
 /* { dg-final { scan-tree-dump "Found COMPLEX_ADD_ROT90" "vect" } } */