fix(gen): purge gen configs and sections

Remove the GEN platform configs for linux and android and all hidden
content in the current pages.

This is a meta-platform that was supposed to enable show a common
document for all arm32 platforms. Unfortunately this contained a lot of
hidden information that was not being exposed for standard releases and
is not being updated.

Signed-off-by: Randolph Sapp <[email protected]>

Author: StaticRocket

README.md

@@ -46,7 +46,6 @@ of directories listed under `configs/`. For example:
  * "J721S2" (representing Jacinto 7 AEP)
  * "J784S4" (representing Jacinto 7 AHP)
  * "J722S" (representing Jacinto 7 AEN)
- * "GEN" (representing General family not listed above)
 
 OS represents the operating system. Possible values correspond to the second
 parameter of files listed under the `configs/<DEVFAMILY>/` directory. For

configs/GEN/GEN_android_config.txt

@@ -162,7 +162,7 @@ Software Information
 
    RemoteProc driver information at :ref:`pru_remoteproc`
 
-   .. ifconfig::  CONFIG_part_family in ('AM335X_family','AM437X_family','General_family')
+   .. ifconfig::  CONFIG_part_family in ('AM335X_family','AM437X_family')
 
       Information about general purpose Ethernet over PRU is at
       :ref:`pru_icss_ethernet`.