Remove versions from requirements.txt for netlify builds
modified: requirements.txt
-Sphinx==3.2.1
-sphinx-autobuild==2020.9.1
-sphinx-copybutton==0.3.1
-sphinx-material==0.0.32
-sphinxcontrib-applehelp==1.0.2
-sphinxcontrib-contentui==0.2.5
-sphinxcontrib-devhelp==1.0.2
-sphinxcontrib-fulltoc==1.2.0
-sphinxcontrib-htmlhelp==1.0.3
-sphinxcontrib-jsmath==1.0.1
-sphinxcontrib-qthelp==1.0.3
-sphinxcontrib-serializinghtml==1.1.4
-sphinx-gitstamp==0.3.1
-sphinxcontrib-plantuml==0.21
-sphinx-togglebutton==0.2.3
\ No newline at end of file
+Sphinx
+sphinx-copybutton
+sphinx-material
+sphinxcontrib-applehelp
+sphinxcontrib-contentui
+sphinxcontrib-devhelp
+sphinxcontrib-fulltoc
+sphinxcontrib-htmlhelp
+sphinxcontrib-jsmath
+sphinxcontrib-qthelp
+sphinxcontrib-serializinghtml
+sphinx-gitstamp
+sphinxcontrib-plantuml
+sphinx-togglebutton
\ No newline at end of file
