Remove incorrect documentation line
Remove incorrect documentation line

This line is definitely wrong, plenty of float32 things
work in the TFLite parser, so it sets the wrong expectations.

Change-Id: I87ac01e14b916ccd767429c124c353ab136174d8
Signed-off-by: Matthew Bentham <286076deec2404ae356dd8bc92f2f71e81044bd4@arm.com>

ARM-software/armnn,ARM-software/armnn,ARM-software/armnn