removed pandoc from the python requirements

requirements.txt

@@ -1,6 +1,16 @@
-flask
-markdown
-urllib3
-pandoc
-pypandoc
-jinja
+click==8.0.3
+Flask==2.0.2
+importlib-metadata==4.10.1
+itsdangerous==2.0.1
+Jinja2==3.0.3
+Markdown==3.3.6
+MarkupSafe==2.0.1
+pkg-resources==0.0.0
+plumbum==1.7.2
+ply==3.11
+pypandoc==1.7.2
+typing-extensions==4.0.1
+urllib3==1.26.8
+Werkzeug==2.0.2
+zipp==3.7.0
+