Delete duplicate array key in whois.php

[[Split portion of a mixed commit.]]
Fix duplicate array keys where values are identical
Left 2 other FIXMEs for duplicate array keys
Remove some unused variables
Remove/comment out some other unused variables
fix: Fix documentation links for LaTeX
fix: Link breakage in Octave
add: Add SCL language file by Leonhard Hösch
fix: Fix a minor issue eating up spaces behind Visual Basic comments
add: Add nginx configuration language file by Cliff Wells, Deoren Moor and Thomas Joiner
add: Added C/C++ support for WinAPI-related sources
fix: Problem with Keyword recognition in plain SQL
add: Allow setup of all keyword groups and comments at once using '*'
fix: Force separate line for comments in INI files
fix: Fix some syntax errors
fix: Fix yet some more syntax errors
fix: Fix a langcheck warning for TypoScript
add: Add VBScript language file by Rory Prendergast
fix: Some minor fixups for VBScript
fix: T-SQL keyword highlighting