Remove separate internals export from SDK

[Mrtenz]

The /internals export is causing issues with Browserify. The easiest solution for now is to remove it, until we switch to the Webpack LavaMoat bundler.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (1edfa52) 96.04% compared to head (95a8cd4) 96.04%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1950   +/-   ##
=======================================
  Coverage   96.04%   96.04%           
=======================================
  Files         251      251           
  Lines        6018     6018           
  Branches      983      983           
=======================================
  Hits         5780     5780           
  Misses        238      238           

Files	Coverage Δ
...ackages/snaps-rpc-methods/src/restricted/dialog.ts	100.00% <ø> (ø)
...ackages/snaps-rpc-methods/src/restricted/notify.ts	94.73% <ø> (ø)
packages/snaps-utils/src/enum.ts	100.00% <ø> (ø)

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