fix(PRU-ICSS): Remove the stale HSR-PRP documentation for legacy platforms

There is a section for HSR-PRP under Industrial Protocols which
have been discontinued but was missed for legacy platforms.
Thus, this doc is outdated and needs to be removed for legacy
platforms as well to avoid confusion for the customers.

Signed-off-by: Meghana Malladi <m-malladi@ti.com>

Author: MeghanaMalladiTI

configs/AM57X/AM57X_linux_toc.txt

@@ -119,7 +119,6 @@ linux/Foundational_Components/Graphics/SGX/Build_Guide
 
 linux/Industrial_Protocols
 linux/Industrial_Protocols_ICSS_Dual_EMAC
-linux/Industrial_Protocols_HSR_PRP
 linux/Industrial_Protocols_PTP
 linux/Industrial_Protocols_RSTP
 linux/Industrial_Protocols_CCLINK

configs/AM65X/AM65X_linux_toc.txt

@@ -113,7 +113,6 @@ linux/Foundational_Components/Graphics/SGX/Build_Guide
 
 linux/Industrial_Protocols
 linux/Industrial_Protocols_ICSS_Dual_EMAC
-linux/Industrial_Protocols_HSR_PRP
 linux/Industrial_Protocols_PTP
 linux/How_to_Guides
 linux/How_to_Guides_Developer_Notes

configs/GEN/GEN_linux_toc.txt

@@ -131,7 +131,6 @@ linux/Foundational_Components/Graphics/SGX/Build_Guide
 
 linux/Industrial_Protocols
 linux/Industrial_Protocols_ICSS_Dual_EMAC
-linux/Industrial_Protocols_HSR_PRP
 linux/Industrial_Protocols_PTP
 linux/Industrial_Protocols_RSTP
 linux/Industrial_Protocols_CCLINK

source/linux/Industrial_Protocols.rst

@@ -8,7 +8,6 @@ Industrial Protocols
    :maxdepth: 2
 
    Industrial_Protocols_ICSS_Dual_EMAC
-   Industrial_Protocols_HSR_PRP
    Industrial_Protocols_PTP
    Industrial_Protocols_RSTP
    Industrial_Protocols_CCLINK