Float code cleanup changes

Pipeline results:

• EVS 26.444 BE test passes.
• decoder pytests:
  MLD scores:
  Original inputs: 562 failed, 374 skipped
  MLD > 10: 33
  MLD > 5 : 85
  MLD < 5 : 444
  +10dB inputs: 562 failed, 374 skipped
  MLD > 10: 144
  MLD > 5 : 195
  MLD < 5 : 223
  -10dB inputs: 562 failed, 374 skipped
  MLD > 10: 8
  MLD > 5 : 40
  MLD < 5 : 514
• encoder pytests results:
  MLD scores:
  Original inputs: 562 tests:
  MLD > 10: 15
  MLD > 5 : 47
  MLD < 5 : 500
  +10dB inputs: 562 tests:
  MLD > 10: 44
  MLD > 5 : 128
  MLD < 5 : 390
  -10dB inputs: 562 tests:
  MLD > 10: 5
  MLD > 5 : 21
  MLD < 5 : 536