bug fix: minor bug removing same keywords

SOL005/NSDManagement-API/NSDManagementKeywords.robot

@@ -315,18 +315,6 @@ Check HTTP Response Header Content-Type Is Any of
     [Arguments]   ${header1}    ${header2}
     Should Contain Any  ${response['headers']['Content-Type']}    ${header1}    ${header2}
 
-Check HTTP Response Header Content-Range Is Present and Matches the requested range
-    Log    Check Content-Range HTTP Header
-    Should Contain    ${response['headers']}    Content-Range
-    Should Be Equal As Strings    ${response['headers']['Content-Range']}    ${range}
-    Log    Header Content-Range is present
-    
-Check HTTP Response Header Content-Length Is Present and Matches the requested range length
-    Log    Check Content-Length HTTP Header
-    Should Contain    ${response['headers']}    Content-Length
-    Should Be Equal As Integers    ${response['headers']['Content-Length']}    ${length}
-    Log    Header Content-Length is present 
-
 Get NSD Content in Zip Format
     Log    Trying to get a NSD present in the NFVO Catalogue
     Set Headers    {"Accept": "${ACCEPT_ZIP}"}