MLBEDSW-10471: Deduplicate RemoveReshape
RemoveReshape is duplicated (and slightly diverging) in TFLiteGraphOptimiser and GraphIrOptimiser. This patch merges them into one and puts the result into the parent GraphOptimiser class.
Signed-off-by: Johan Gunnarsson johan.gunnarsson@arm.com Change-Id: I1153f21d3a2f3fbdcb71ba2a27e3bd606bfe3ae4