Revert "Use conf file instead of environment variable"

This reverts commit e7ef9d0.

Author: samanklesaria

docs/Makefile

@@ -25,7 +25,7 @@ docset: html
 # "make mode" option.  $(O) is meant as a shortcut for $(SPHINXOPTS).
 %: Makefile
 	doxygen source/Doxyfile
-	@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
+	PYTHONPATH="$(realpath ../test)" @$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
 	@python post_process_dispatcher.py $(BUILDDIR)
 
 clean:

docs/source/conf.py

@@ -22,11 +22,8 @@
 import sys
 import warnings
 from datetime import datetime
-from pathlib import Path
-
 
 sys.path.insert(0, os.path.abspath("."))
-sys.path.insert(0, str(Path('..', '..', 'test').resolve()))
 
 
 import pytorch_sphinx_theme