opdreport: Remove duplicate fetch_serial_number function

fetch_serial_number is moved to opfunctions script,
it is being sourced in opdreport, hence this function
is no longer needed in opdreport.

Change-Id: Ibbdff9ac10d1ee47827c276d54e78172286035d4
Signed-off-by: Gopichand Paturi <gopichandpaturi@gmail.com>
diff --git a/dump/tools/opdump/opdreport b/dump/tools/opdump/opdreport
index 7439709..38ce51f 100644
--- a/dump/tools/opdump/opdreport
+++ b/dump/tools/opdump/opdreport
@@ -76,17 +76,6 @@
 #Source opdreport common functions
 . $DREPORT_INCLUDE/opfunctions
 
-# @brief Get serial number property from inventory
-function fetch_serial_number() {
-    serialNo=$(busctl get-property "$INVENTORY_MANAGER" "$INVENTORY_PATH" \
-            "$INVENTORY_ASSET_INT" SerialNumber | cut -d " " -f 2 | \
-        sed 's/^"\(.*\)"$/\1/')
-
-    if [ -z "$serialNo" ]; then
-        serialNo="0000000"
-    fi
-}
-
 # @brief Check the validity of user inputs and initialize global variables
 function initialize() {
     # shellcheck disable=SC2154 # name comes from elsewhere