fix(AM57X): Remove invalid demos from ToC

Only Dual-camera and Video-graphics demos are applicable for AM57xx
devices. Remove all other demos from Table of Contents.

Signed-off-by: Beleswar Padhi <[email protected]>

Author: 3V3RYONE

configs/AM57X/AM57X_linux_toc.txt

@@ -125,14 +125,7 @@ linux/Industrial_Protocols_OPCUA
 linux/Examples_and_Demos
 linux/Examples_and_Demos_Application_Demos
 linux/Examples_and_Demos/Application_Demos/Dual_Camera_Demo
-linux/Examples_and_Demos/Application_Demos/Video_Analytics
-linux/Examples_and_Demos/Application_Demos/Barcode
-linux/Examples_and_Demos/Application_Demos/QT_Thermostat_HMI_Demo
-linux/Examples_and_Demos/Application_Demos/PRU_ADC
 linux/Examples_and_Demos/Application_Demos/Video_Graphics_Test
-linux/Examples_and_Demos/Application_Demos/Watchdog_demo
-linux/Examples_and_Demos/Application_Demos/Additional_Application_Demo_Links
-linux/Examples_and_Demos_Sub-system_Demos
 linux/How_to_Guides
 linux/How_to_Guides_Host
 linux/How_to_Guides/Host/How_to_Build_a_Ubuntu_Linux_host_under_VMware