Add optional imports to mock imports, remove from docs/requirements.txt

Author: tekktrik

docs/conf.py

@@ -25,7 +25,7 @@
 # Uncomment the below if you use native CircuitPython modules such as
 # digitalio, micropython and busio. List the modules you use. Without it, the
 # autodoc module docs will fail to generate with a warning.
-autodoc_mock_imports = ["displayio", "pwmio"]
+autodoc_mock_imports = ["displayio", "pwmio", "adafruit_display_text", "adafruit_bitmap_font"]
 
 
 intersphinx_mapping = {

docs/requirements.txt

@@ -3,4 +3,3 @@
 # SPDX-License-Identifier: Unlicense
 
 sphinx>=4.0.0
-adafruit_display_text