DynamicTablesPkg: Remove duplicated words

In an effort to clean the documentation of the above
package, remove duplicated words.

Cc: Sami Mujawar <Sami.Mujawar@arm.com>
Cc: Alexei Fedorov <Alexei.Fedorov@arm.com>
Signed-off-by: Pierre Gondois <pierre.gondois@arm.com>
Reviewed-by: Sami Mujawar <sami.mujawar@arm.com>

DynamicTablesPkg/Library/FdtHwInfoParserLib/Serial/ArmSerialPortParser.c

@@ -278,7 +278,7 @@ GetSerialConsoleNode (
     return EFI_INVALID_PARAMETER;
   }
 
-  // The "chosen" node resides at the the root of the DT. Fetch it.
+  // The "chosen" node resides at the root of the DT. Fetch it.
   ChosenNode = fdt_path_offset (Fdt, "/chosen");
   if (ChosenNode < 0) {
     return EFI_NOT_FOUND;