Removed unneeded kwarg handler in setters of audiodelays and audiofilters

[relic-se]

Updated the following setters within audiodelays and audiofilters which were unnecessarily using kwargs in accordance with @jepler 's research within #9863.

shared-bindings/audiodelays/Echo.c:static mp_obj_t audiodelays_echo_obj_set_delay_ms
shared-bindings/audiodelays/Echo.c:static mp_obj_t audiodelays_echo_obj_set_decay
shared-bindings/audiodelays/Echo.c:static mp_obj_t audiodelays_echo_obj_set_mix
shared-bindings/audiodelays/Echo.c:static mp_obj_t audiodelays_echo_obj_set_freq_shift
shared-bindings/audiofilters/Filter.c:static mp_obj_t audiofilters_filter_obj_set_filter
shared-bindings/audiofilters/Filter.c:static mp_obj_t audiofilters_filter_obj_set_mix

According to the change in FLASH_FIRMWARE sizes when building for raspberry_pi_pico2, 208 bytes were saved with roughly ~35 bytes per setter. Within the output UF2 size, 512 bytes were saved at ~85 bytes per setter (likely due to filesystem block sizes).

Before:

Memory region         Used Size  Region Size  %age Used
  FLASH_FIRMWARE:      820636 B      1020 KB     78.57%
             RAM:       60272 B       512 KB     11.50%
       SCRATCH_Y:           0 B         4 KB      0.00%
       SCRATCH_X:          2 KB         4 KB     50.00%
Converted to uf2, output size: 1641472, start address: 0x10000000
Wrote 1641472 bytes to build-raspberry_pi_pico2/firmware.uf2

After:

Memory region         Used Size  Region Size  %age Used
  FLASH_FIRMWARE:      820428 B      1020 KB     78.55%
             RAM:       60272 B       512 KB     11.50%
       SCRATCH_Y:           0 B         4 KB      0.00%
       SCRATCH_X:          2 KB         4 KB     50.00%
Converted to uf2, output size: 1640960, start address: 0x10000000
Wrote 1640960 bytes to build-raspberry_pi_pico2/firmware.uf2

[jepler]

thank you! Looks good.