docs: move to yosys package and remove symbolator deps

Signed-off-by: Alessandro Comodi <acomodi@antmicro.com>

docs/conf.py

diff --git a/docs/conf.py b/docs/conf.py
index bea2635..c6175f9 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -58,7 +58,6 @@
     'sphinx.ext.napoleon',
     'sphinx.ext.todo',
     'sphinx_markdown_tables',
-    'symbolator_sphinx',
     'sphinxcontrib_hdl_diagrams'
 ]
 

docs/environment.yml

diff --git a/docs/environment.yml b/docs/environment.yml
index 715caaa..a07fbc7 100644
--- a/docs/environment.yml
+++ b/docs/environment.yml
@@ -12,7 +12,7 @@
   - litex-hub
   - conda-forge
 dependencies:
-  - litex-hub::symbiflow-yosys
+  - litex-hub::yosys=0.9_5007_g2116c585
   - python=3.7
   - pip
   - pycairo

docs/requirements.txt

diff --git a/docs/requirements.txt b/docs/requirements.txt
index f59e608..43dc47f 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -13,9 +13,6 @@
 # HDL diagrams using Yosys + netlistsvg
 git+https://github.com/SymbiFlow/sphinxcontrib-hdl-diagrams.git@master#egg=sphinxcontrib-hdl-diagrams
 
-# Module diagrams
-git+https://github.com/SymbiFlow/symbolator.git@master#egg=symbolator
-
 pycairo
 # vext.gi