chore: remove environment variable from Justfile

Author: Sl1mb0

guests/python/Justfile

@@ -24,9 +24,6 @@ export PYO3_CROSS_LIB_DIR := DOWNLOADS_DIR / "python-sdk"
 PYTHON_TMP_VENV := DOWNLOADS_DIR / "venv"
 PYTHON_SITE_PACKAGES := PYO3_CROSS_LIB_DIR / "lib" / "python" + PYO3_CROSS_PYTHON_VERSION / "site-packages"
 
-# Not used in the script but the linker must know where to find the WASI sysroot libs.
-export WASI_SDK_LINK_PATH := DOWNLOADS_DIR / "wasi-sysroot" / "lib" / "wasm32-wasip2"
-
 # download pre-built Python WASM SDK
 [private]
 download-python-sdk: