Removing Scar Tissue or Capsule Left from Nose Silicone Implant?

The capsule formed around a nasal implant is quite thin and provably contributes very little bulk overall to your nose.  If you still have swelling that is a factor this can be improved by injecting a small dose of a steroid under the skin.

The irregularities on the bridge of the nose are probably more related to the previous surgery itself rather than any scar tissue formation. The capsule itself from a silicone implant is extremely thin and minimal and usually does not cause any distortion of the bridge-to-tip. The skin around the glabella is very thick and hides any irregularities. A revision rhinoplasty surgeon who has many years of experience and has performed thousands of nasal surgeries is probably someone you should see considering revision rhinoplasty.

The scar tissue may be removed gingerly, but the risk is that the tissues will have diamaged blood supply, and you may lose the skin on your nose.  I personally would not do it, however, some very experienced and brave rhinoplasty surgeons may feel more comfortable with it.
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Trying to remove all the scar tissue might in fact make things look a lot worse. You're best bet is to follow the advice of an experienced rhinoplasty surgeon.

Check with the American Society for Aesthetic Plastic Surgery to find someone in your area who concentrates the bulk of their surgical practice on complicated rhinoplasties.

Don't cut corners on expense or effort in looking for someone to help you out of this corner. Hopefully the surgeon who removed the implant can give you your best advice.

Good luck.