Resolve "Review and possibly remove unused tables", part 01

• Related issues: #2095
• Requested reviewers: @fotopoulou

Reason why this change is needed

• Remove a part of the unused tables from the FX code

Description of the change

• Remove a part of the unused tables from the FX code. Addresses:
  • dft_res_gains_q_Q31[][2]
  • bpf_weights_16_ivas_fx[16]
  • LP_assym_window_16k_fx[]
  • pow_10_q11[128]

Affected operating points

• All operating points are BE.