[gcc r14-9312] RISC-V: Cleanup unused code in riscv_v_adjust_bytesize [NFC]

[Pan Li]

https://gcc.gnu.org/g:1a8dde963590b415768b070bd309b188858dc589

commit r14-9312-g1a8dde963590b415768b070bd309b188858dc589
Author: Pan Li <pan2.li@intel.com>
Date:   Tue Mar 5 15:29:15 2024 +0800

    RISC-V: Cleanup unused code in riscv_v_adjust_bytesize [NFC]
    
    Cleanup mode_size related code which is not used anymore. Below tests are
    passed for this patch.
    
    * The RVV fully regresssion test.
    
    gcc/ChangeLog:
    
            * config/riscv/riscv.cc (riscv_v_adjust_bytesize): Cleanup unused
            mode_size related code.
    
    Signed-off-by: Pan Li <pan2.li@intel.com>

Diff:
---
 gcc/config/riscv/riscv.cc | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/gcc/config/riscv/riscv.cc b/gcc/config/riscv/riscv.cc
index 56cd8d2c23f..691d967de29 100644
--- a/gcc/config/riscv/riscv.cc
+++ b/gcc/config/riscv/riscv.cc
@@ -1527,10 +1527,6 @@ riscv_v_adjust_bytesize (machine_mode mode, int scale)
 	return BYTES_PER_RISCV_VECTOR;
 
       poly_int64 nunits = GET_MODE_NUNITS (mode);
-      poly_int64 mode_size = GET_MODE_SIZE (mode);
-
-      if (maybe_eq (mode_size, (uint16_t) -1))
-	mode_size = riscv_vector_chunks * scale;
 
       if (nunits.coeffs[0] > 8)
 	return exact_div (nunits, 8);