Extrapolator : Remove un-needed cast

This dynamic_cast should be completely un-needed. The return type is already the "right" one

WARNING: big files (>100K) are found in the changeset

264K in file Tracking/TrkExtrapolation/TrkExTools/src/Extrapolator.cxx

This merge request affects 1 package:

• Tracking/TrkExtrapolation/TrkExTools

Adding @amorley as watcher

added Tracking master review-pending-level-1 labels

CI Result SUCCESS (hash 742e6e45)

	Athena	AthSimulation
externals
cmake
make
required tests
optional tests

Full details available on this CI monitor view
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 9038]

code change is clear and simple, CI tests passed, approving.

Roman (L1)

added review-approved label and removed review-pending-level-1 label

merged

mentioned in commit 3aaf8b42

added sweep:ignore label