removed unusable tbx11k custom split 3

...bench/configs/datasets/tbx11k_simplified_v3/fold_7_rgb.py

src/ptbench/configs/datasets/tbx11k_simplified_v3/fold_8.py

...bench/configs/datasets/tbx11k_simplified_v3/fold_8_rgb.py

src/ptbench/configs/datasets/tbx11k_simplified_v3/fold_9.py

...bench/configs/datasets/tbx11k_simplified_v3/fold_9_rgb.py

src/ptbench/configs/datasets/tbx11k_simplified_v3/rgb.py

...ench/configs/datasets/tbx11k_simplified_v3_RS/__init__.py

...bench/configs/datasets/tbx11k_simplified_v3_RS/default.py

...tbench/configs/datasets/tbx11k_simplified_v3_RS/fold_0.py

...tbench/configs/datasets/tbx11k_simplified_v3_RS/fold_1.py

...tbench/configs/datasets/tbx11k_simplified_v3_RS/fold_2.py

...tbench/configs/datasets/tbx11k_simplified_v3_RS/fold_3.py

...tbench/configs/datasets/tbx11k_simplified_v3_RS/fold_4.py

...tbench/configs/datasets/tbx11k_simplified_v3_RS/fold_5.py

...tbench/configs/datasets/tbx11k_simplified_v3_RS/fold_6.py

...tbench/configs/datasets/tbx11k_simplified_v3_RS/fold_7.py

...tbench/configs/datasets/tbx11k_simplified_v3_RS/fold_8.py

...tbench/configs/datasets/tbx11k_simplified_v3_RS/fold_9.py

src/ptbench/data/tbx11k_simplified_v3/__init__.py

src/ptbench/data/tbx11k_simplified_v3/default.json.bz2