[BUGFIX] Wrong result on unequal globalVar condition

A TypoScript condition like "[globalVar = LIT:10 != 10]"
returns a true value instead of the expected false value.
The reason for that is a superfluous trinity (type safe)
comparator.

Change-Id: Ib9f468da0a129f08d5d071a4f97bd09904f0c91b
Fixes: #45165
Releases: 6.0, 6.1, 6.2
Reviewed-on: https://review.typo3.org/21663
Reviewed-by: Oliver Hader
Tested-by: Oliver Hader