[testsuite] drop explicit run overrider in more dfp tests

A few more dfp tests that recently got backported to gcc-14 override
dfp.exp's selection of default action depending on dfprt.  Let the
default stand.


for  gcc/testsuite/ChangeLog

	* gcc.dg/dfp/pr102674.c: Use the default dg-do.
	* gcc.dg/dfp/pr43374.c: Likewise.

gcc/testsuite/gcc.dg/dfp/pr102674.c

@@ -1,5 +1,4 @@
 /* PR middle-end/102674 */
-/* { dg-do run } */
 /* { dg-options "-O2" } */
 
 #define FP_NAN 0

gcc/testsuite/gcc.dg/dfp/pr43374.c

@@ -1,5 +1,4 @@
 /* PR middle-end/43374 */
-/* { dg-do run } */
 /* { dg-options "-O2" } */
 
 __attribute__((noipa)) int