[BUGFIX] Removed clickMenu code around header icon in info window

The header icon in the ElementInfo screen has a click link added
but this doesn't work and doesn't make sense as shown links would
be in the wrong context.

This patch removes the javasript to open the clickmenu from the icons.

Resolves: #56250
Releases: 6.3, 6.2
Change-Id: I2b907188958f166a129617da36585c07be3a143c
Reviewed-on: https://review.typo3.org/31358
Reviewed-by: Markus Klein
Tested-by: Markus Klein