chore: delete dead PYAUTO_SMALL_DATASETS/PYAUTO_FAST_PLOTS from build profiles (#29)

Neither knob is ever read in an autofit-only workspace. PYAUTO_SMALL_DATASETS
is read only in PyAutoArray/PyAutoGalaxy/PyAutoLens; PYAUTO_FAST_PLOTS only in
PyAutoArray and PyAutoGalaxy. PyAutoFit does not import autoarray and no script
here imports autoarray/autogalaxy/autolens, so the reading code never loads.

The stale comments gave the copy-paste away: an autofit config claiming to
'reduce MGE gaussians' and skip 'critical curve/caustic overlays'.

Refs PyAutoLabs/autofit_workspace#111

Co-authored-by: Jammy2211 <JNightingale2211@gmail.com>

Author: Jammy2211

config/build/env_vars.yaml

@@ -13,9 +13,7 @@ defaults:
   PYAUTO_SKIP_FIT_OUTPUT: "1"               # Skip pre/post-fit I/O, VRAM profiling, result text
   PYAUTO_SKIP_VISUALIZATION: "1"            # Skip fit visualization and plotting
   PYAUTO_SKIP_CHECKS: "1"                   # Skip mesh validation, position checks, weight thresholds
-  PYAUTO_SMALL_DATASETS: "1"                # Cap grids/masks to 15x15, reduce MGE gaussians
   PYAUTO_DISABLE_JAX: "1"                   # Force use_jax=False, avoid JIT compilation overhead
-  PYAUTO_FAST_PLOTS: "1"                    # Skip tight_layout() + critical curve/caustic overlays
   JAX_ENABLE_X64: "True"                    # Enable 64-bit precision in JAX
   NUMBA_CACHE_DIR: "/tmp/numba_cache"       # Writable cache dir for numba
   MPLCONFIGDIR: "/tmp/matplotlib"           # Writable config dir for matplotlib