We can delete the manually added city names in a very easy way but these steps must be performed during a maintenance window as the service stop and start is must to get these changes in effect. 
	- We need to reach the directory/ folder from NetIM Core VM : "/data1/riverbed/NetIM/2.x.x_xxxx/lib/xml/res/geo/"
 
	- Open the "geo" folder and find the file named "Geo_en_changes.res" (it is  the file where we manully add the city entry).
 
	- Open it in Notepad and Delete the entire entry for the unwanted city (including country, state, city, timezone etc).
 
	- Save the file using Ctrl+S.
 
	- SSH to the NetIM core using Putty.
 
	- Run the command mentioned below-
	;stop all 
	app.sh UPDATE_GEO_DATA
	start all
	  
	- Login to the NetIM core, check and you won't see the same city entry for twice.
 
Note: The above mentioned steps must be followed during a maintenance window as the service stop and start is required to take the changes place.
Example of step 3: Here I want delete City named "Eagan".
Before Deleting"Eagan city"-
        Add cities not present in the dataset
        These should be listed under their appropriate country and region codes
        If the city does not have a region code use "only" as the region code
        At a minimum you should define latitude, longitude, and timezone.
    -->
    <fs:cp name="geoAdditions">
      <fs:cp name="US">
        <fs:cp name="MN">
          <fs:cp name="Eagan">
              <fs:sp name="timezone">America/Chicago</fs:sp>
              <fs:sp name="latitude">44.8041</fs:sp>
              <fs:sp name="longitude">-93.1668</fs:sp>
              <fs:sp name="postalCode">55121</fs:sp>
          </fs:cp>
        </fs:cp>
      </fs:cp>
      <fs:cp name="US">
        <fs:cp name="MN">
          <fs:cp name="Bloomington">
              <fs:sp name="timezone">America/Chicago</fs:sp>
              <fs:sp name="latitude">44.8407</fs:sp>
              <fs:sp name="longitude">-93.2982</fs:sp>
              <fs:sp name="postalCode">55437</fs:sp>
          </fs:cp>
After Deleting-
Add cities not present in the dataset
        These should be listed under their appropriate country and region codes
        If the city does not have a region code use "only" as the region code
        At a minimum you should define latitude, longitude, and timezone.
    -->
    <fs:cp name="geoAdditions">
            <fs:cp name="US">
        <fs:cp name="MN">
          <fs:cp name="Bloomington">
              <fs:sp name="timezone">America/Chicago</fs:sp>
              <fs:sp name="latitude">44.8407</fs:sp>
              <fs:sp name="longitude">-93.2982</fs:sp>
              <fs:sp name="postalCode">55437</fs:sp>
          </fs:cp>