ArmPkg/SmbiosMiscDxe: Remove duplicate HII string definition

This patch removes duplicate HII string definition in the
MiscSystemManufacturer.uni.

Signed-off-by: Nhi Pham <nhi@os.amperecomputing.com>
Reviewed-by: Sami Mujawar <sami.mujawar@arm.com>

Author: Nhi Pham via groups.io

ArmPkg/Universal/Smbios/SmbiosMiscDxe/Type01/MiscSystemManufacturer.uni

@@ -13,7 +13,6 @@
 
 #string STR_MISC_SYSTEM_MANUFACTURER   #language en-US  "Not Specified"
 #string STR_MISC_SYSTEM_PRODUCT_NAME   #language en-US  "Not Specified"
-#string STR_MISC_SYSTEM_PRODUCT_NAME   #language en-US  "Not Specified"
 #string STR_MISC_SYSTEM_VERSION        #language en-US  "Not Specified"
 #string STR_MISC_SYSTEM_SERIAL_NUMBER  #language en-US  "Not Specified"
 #string STR_MISC_SYSTEM_SKU_NUMBER     #language en-US  "Not Specified"