Review and possibly remove unused tables

Bug description

The following tables appear to be unused in the codec (result of scripts/find_unused_symbols.sh)

• C_VQ_fx
• ENERGY_BAND_NUM
• E_max5_tbl
• LP_assym_window_16k_fx
• SP_CENTER_BAND_NUM_TAB
• att_pow_tbl
• band_len_harm_float
• bpf_weights_16_ivas_fx
• c_aaiSpreadFunction48 <-- occurrences in (disabled?) source-code
• c_aiAbsoluteThresh48 <-- occurrences in (disabled?) source-code
• c_aiBandwidthAdjust48 <-- occurrences in (disabled?) source-code
• c_aiHuffmanSize
• c_aiLogAddTable <-- occurrences in (disabled?) source-code
• c_aiQuantMaxValues <-- occurrences in (disabled?) source-code
• c_pfWindowLUT
• ct2
• dft_res_gains_q_Q31
• dicnlg2_float
• dsHighDiracsTab
• expPkEnrg_tbl
• fb_bwe_sm_subband_float
• fb_bwe_subband_float
• gw_fx
• ivas_fine_gain_pred_sqrt_bw
• ivas_mc_paramupmix_huff_nodes_dt
• lsf_dims_ivas
• lsf_ind_dims_ivas
• lsf_offs_ivas
• manPkEnrg_tbl
• maxC_37bits
• maxN_37bits
• nb_sect_12k8
• nb_subsect_12k8
• pow_10_q11
• predmode_tab_float
• scaleTable_cn_only_amrwbio_fx_by_10f
• stages_37bits
• tipos

Before removing, it should be checked whether they are not used by intention!