Remove unnecessary rounding mode checks and settings for RV32F

It was observed that the instructions feqs, flts, and fles are not
affected by rounding modes in any way. Therefore, remove the
unnecessary rounding mode checks and settings associated with these
instructions. This optimization aims to avoid potential performance
impacts caused by redundant operations related to rounding modes.

src/rv32_template.c

@@ -1806,7 +1806,6 @@ RVOP(
 RVOP(
     feqs,
     {
-        set_dynamic_rounding_mode(rv);
         uint32_t ret = f32_eq(rv->F[ir->rs1], rv->F[ir->rs2]);
         if (ir->rd)
             rv->X[ir->rd] = ret;
@@ -1823,7 +1822,6 @@ RVOP(
 RVOP(
     flts,
     {
-        set_dynamic_rounding_mode(rv);
         uint32_t ret = f32_lt(rv->F[ir->rs1], rv->F[ir->rs2]);
         if (ir->rd)
             rv->X[ir->rd] = ret;
@@ -1836,7 +1834,6 @@ RVOP(
 RVOP(
     fles,
     {
-        set_dynamic_rounding_mode(rv);
         uint32_t ret = f32_le(rv->F[ir->rs1], rv->F[ir->rs2]);
         if (ir->rd)
             rv->X[ir->rd] = ret;