Cleanup dead code

See merge request jvet/VVCSoftware_VTM!887

possible fix for use after free issue #491

See merge request jvet/VVCSoftware_VTM!885

Fix #484: handeling the case that all coding modes of a CU do not get coding results

See merge request jvet/VVCSoftware_VTM!883

refactor ceil/floor log2 handling

See merge request jvet/VVCSoftware_VTM!881

remove constant parts from ALF chroma decision

See merge request jvet/VVCSoftware_VTM!886

Patch provided by Nan Hu
Reduces LD chroma loss of JVET-O0491

fix compiler error for JVET_O1164_RPR and ENABLE_SPLIT_PARALLELISM

See merge request jvet/VVCSoftware_VTM!882

- create ceilLog2() function based on floorLog2
- use intrinsics for MSVC in floorLog2
- replace all ceil(log2()) calls in HLS with ceilLog2()

Fixed the MVD range to be compatible with entropy coding limit.

See merge request jvet/VVCSoftware_VTM!871

JVET-O1164 RPR implementation

See merge request jvet/VVCSoftware_VTM!875

Clean up / speed up various SIMD functions

See merge request jvet/VVCSoftware_VTM!874

Remove unused functions

See merge request jvet/VVCSoftware_VTM!880

Reduce number of dynamic memory allocations

See merge request jvet/VVCSoftware_VTM!872

improve configurability of fast intra decision introduced in JVET-O0050

See merge request jvet/VVCSoftware_VTM!879

- add option to completely disable
- add iparameter to software manual

JVET-O0491: remove tb() and tu() codes

See merge request jvet/VVCSoftware_VTM!878

Fix #476 Scaling list addressing after adding palette prediction (MODE_PLT)

See merge request jvet/VVCSoftware_VTM!877

refactoring SbTMVP to align with spec

See merge request jvet/VVCSoftware_VTM!826

JVET-O0525: Removal of PCM mode.

See merge request jvet/VVCSoftware_VTM!876

  - Remove additional unused variable.