Remove special treatment of org.eclipse.swt in API-Tools

[HannesWell]

Now that eclipse-platform/eclipse.platform.swt#1008 is submitted, I think we can remove the special treatment of SWT and its fragments, since they should simply be compared against the baseline as they are.
Fixes #1084

[github-actions]

Test Results

   290 files  ±0     290 suites  ±0   54m 57s ⏱️ - 17m 6s
 3 526 tests ±0   3 467 ✅ ±0   58 💤 ±0  1 ❌ ±0 
10 823 runs  ±0  10 658 ✅ ±0  164 💤 ±0  1 ❌ ±0 

For more details on these failures, see this check.

Results for commit 35976cd. ± Comparison against base commit 792018e.

♻️ This comment has been updated with latest results.

[akurtakov]

This reminds me of dropping SWT special treatment in Tycho. It's so nice to see SWT being less and less of an exception. Thanks @HannesWell !

[laeubi]

@akurtakov As far as I know Tycho has long time ago dropped special treatment of SWT, this is now handled by p2.inf + filters and was even improved thanks to @merks adding new testcases, also note that p2.inf customization is not special to swt,its even used in JDT / PDE / Equinox.