Remove dead code in lookupScheme2

[dylanjtuttle]

Remove code in static function lookupScheme2 dependent on boolean variable isInt64 which was hard-coded to false.

This also removes code that was causing a warning, so this PR also contributes to (but does not close) openj9 #14859

[dylanjtuttle]

Henry @hzongaro, could you review when you have the time?

[hzongaro]

The changes look correct. Just a minor request to clean up some stray tab characters in the source.

[hzongaro]

Looks good. Thanks!

[hzongaro]

Jenkins build all

[hzongaro]

x86-64 macOS failures appear to be due to issue #6516

34: [----------] 19 tests from PortSockTest
34: /Users/runner/work/1/s/fvtest/porttest/omrsockTest.cpp:1209: Failure
34:       Expected: rc
34:       Which is: 1
34: To be equal to: 2
34: [  FAILED  ] PortSockTest.poll_functionality_basic (1001 ms)
34: /Users/runner/work/1/s/fvtest/porttest/omrsockTest.cpp:51: Failure
34:       Expected: privateOmrPortLibrary->sock_bind(privateOmrPortLibrary, *serverSocket, serverSockAddr)
34:       Which is: -506
34: To be equal to: 0
34: /Users/runner/work/1/s/fvtest/porttest/omrsockTest.cpp:1259: Failure
34:       Expected: privateOmrPortLibrary->sock_accept(privateOmrPortLibrary, serverSocket, &connectedServerSockAddr, &connectedServerSocket)
34:       Which is: -20
34: To be equal to: 0
34: [  FAILED  ] PortSockTest.poll_functionality_many_sockets (1 ms)

Of course, the only testing that was necessary for this change was plinux and aix, both of which were successful. Merging.